Journal Papers and Book Chapters
-
1. Jung Y. Huang and Chien Y. Lin : "Real-time Localization and Nanospectroscopy of Single Epidermal Growth Factor Receptors in Live Cells"---Trend in Physical Chemistry, in press (2015).
In the present paper, we demonstrate a technique that can simultaneously localize single epidermal
growth factor receptors (EGFRs) in live cells and record their spectra as well. This technique has the advantages of both single-molecule sensitivity and parallel detection. By exploiting the environmentinduced spectral changes of fluorescently tagged
EGFRs, we disclosed that the environments of EGFR dimers in activated cells differ from the environments of EGFRs in cells at rest. This simple approach could open a route for devising a large number of biologically relevant applications
that offer the advantages of minimum perturbation and single-molecule parallel detection.
-
2. Chien Y. Lin, Jung Y. Huang, and Leu-Wei Lo : "Unraveling the Impact of Lipid Domains on the Dimerization Processes of Single-Molecule EGFRs of Live Cells"---Biochimica et Biophysica Acta 1848, 886-893 (2015).
Epidermal growth factor receptor (EGFR/ErbB1) is a transmembrane protein that can drive cell growth and survival via the ligand-induced dimerization of receptors. Because dimerization is a common mechanism for signal transduction, it is important to improve our understanding of how the dimerization process and membrane structure regulate signal transduction. In this study, we examined the effect of lipid nanodomains on the dimerization process of EGFR molecules. We discovered that after ligand binding, EGFR molecules may move into lipid nanodomains. The lipid nanodomains surrounding two liganded EGFRs can merge during their correlated motion. The transition rates between different diffusion states of liganded EGFR molecules are regulated by the lipid domains. Our method successfully captures both the sensitivity of single-molecule processes and statistic accuracy of data analysis, providing insight into the connection between the mobile clustering process of receptors
and the hierarchical structure of plasma membrane.
-
3. Chien Y. Lin, Jung Y. Huang, and Leu-Wei Lo : "Energetic modeling and single-molecule verification of dynamic regulation on receptor complexes by actin corrals and lipid raft domains"---J. Chem. Phys. 141, 215102–9 (2014).
We developed an energetic model by integrating the generalized Langevin equation with the Cahn-Hilliard equation to simulate the diffusive behaviors of receptor proteins in the plasma membrane of a living cell. Simulation results are presented to elaborate the confinement effects from actin corrals and protein-induced lipid domains. Single-molecule tracking data of epidermal growth factor receptors (EGFR) acquired on live HeLa cells agree with the simulation results and the mechanism that controls the diffusion of single-molecule receptors is clarified. We discovered that after ligand binding, EGFR molecules move into lipid nanodomains. The transition rates between different diffusion states of liganded EGFR molecules are regulated by the lipid domains. Our method successfully captures dynamic interactions of receptors at the single-molecule level and provides insight into the functional architecture of both the diffusing EGFR molecules and their local cellular environment.
-
4. Jung Y. Huang, Chien Y. Lin, Wei-Sheng Liu, and Jen-Inn Chyi : "Quantum control study of ultrafast optical responses in semiconductor quantum dot devices"---Optics Express 22, 30815–30825 (2014).
Two quantum control spectroscopic techniques were applied to study InAs quantum dot (QD) devices, which contain different strainreducing layers. By adaptively control light matter interaction, a delayed resonant response from the InAs QDs was found to be encoded into the optimal phase profile of ultrafast optical pulse used. We verified the delayed resonant response to originate from excitons coupled to acoustic phonons of InAs QDs with two-dimensional coherent spectroscopy. Our study yields valuable dynamical information that can deepen our understanding of the coherent coupling process of exciton in the quantum-confined systems.
-
5. Chien Y. Lin, Jung Y. Huang, and Leu-Wei Lo : "Deciphering the Catalysis-Associated Conformational Changes of Human Adenylate Kinase 1 with Single-Molecule Spectroscopy"---J. Phys. Chem. B 117, 13947–13955 (2013).
Human adenylate kinase isoenzyme 1 (AK1) is the key enzyme in maintaining the cellular energy homeostasis. The catalysis-associated conformational changes of AK1 involve large-amplitude rearrangements. To decipher the conformational changes of AK1 at the single-molecule level, we tagged AK1 with two identical fluorophores, one near the substrate-binding site and the other at the boundary of the core domain. We found that magnesium ion binding to AK1 increases the structural heterogeneity of AK1, whereas ADP binding reduces the structural heterogeneity. We exploited the hidden Markov model to extract the underlying catalysis-associated conformational dynamics and determined thermodynamic parameters of the multiple catalytic pathways. The third-order correlation difference calculated from photon fluctuation traces reveals the irreversible nature of the conformational motions, suggesting that single-molecule AK1 is in a nonequilibrium steady state. This discovery offers a fresh viewpoint to look into the molecular mechanisms of cellular biochemistry.
-
6. Wen-Hsien Huang, Jia-Min Shieh, Fu-Ming Pan, Chang-Hong Shen, Jung Y. Huang, Tsung-Ta Wu, Ming-Hsuan Kao, Tzu-Hsuan Hsiao, Peichen Yu, Hao-Chung Kuo, and Ching-Ting Lee : "Multi-functional stacked light-trapping structure for stabilizing and boosting solar-electricity efficiency of hydrogenated amorphous silicon solar cells"---Appl. Phys. Lett. 103, 073107 (2013).
A sandwiched light-trapping electrode structure, which consists of a capping aluminum-doped ZnO (AZO) layer, dispersed plasmonic Au-nanoparticles (Au-NPs), and a micro-structured transparent conductive substrate, is employed to stabilize and boost the conversion-efficiency of hydrogenated amorphous silicon (a-Si:H) solar cells. The conformal AZO ultrathin layer (5 nm) smoothened the Au-NP-dispersed electrode surface, thereby reducing defects across the AZO/a-Si:H interface and resulting in a high resistance to photo-degradation in the ultraviolet-blue photoresponse band. With the plasmonic light-trapping structure, the cell has a high conversion-efficiency of 10.1% and the photodegradation is as small as 7%.
-
7. Chien Y. Lin, Jung Y. Huang, and Leu-Wei Lo : "Dynamic regulation on energy landscape evolution of single-molecule protein by conformational fluctuation"---Phys. Rev. E 86, 021925 (2012).
We formalize a theory to help explore the effect of conformational fluctuation on the energy landscape evolution of single-molecule protein. Using this formalization, we investigate the photon emission from single photoactivated fluorescent protein. A bimodal regulation on the energy landscape evolution was discovered, and its origin was attributed to slow conformational fluctuations of the protein matrix.
-
8. Jung Y. Huang, ChienY. Lin, Chang-Hong Shen, Jia-Min Shieh, and Bau-Tong Dai : "Low cost high-efficiency amorphous silicon solar cells with improved light-soaking stability"---Solar Energy Materials & Solar Cells 98, 277–282 (2012).
We investigate the performance of amorphous Si (a-Si) solar cells fabricated with Inductively Coupled Plasma (ICP) deposition technique. The ICP system produces a-Si films with low defect density (3x10^15 cm^-3), resulting in a conversion efficiency of 9.6%. Deep level transient spectroscopy (DLTS) reveals that hole carriers trapped at defects near the valence band edge delocalize at 130 K; while trapped electrons can only be emitted into the conduction band near room temperature. Spectrally resolved DLTS study further indicates that light soaking enhances the emission rate of the tapped electrons near the conduction band edge while reduces the transition moments from the hole-trapping defect levels to the conduction band. The combined effects and light soaking-induced defects are responsible for the degradation of a thin film solar cell by light soaking.
-
9. Jung Y. Huang and Liu S. Li : "Self Assembled Liquid Crystal Polymers on Photo-Irradiated Alignment Surfaces for Tailoring Response Properties of Liquid Crystal"---J. Phys. Chem. B 115, 11770–11775 (2011).
A liquid crystal polymer (LCP) self-assembled on a photoirradiated substrate can modify the viscoelastic response of liquid crystal medium on the substrate. Sum-frequency vibrational spectroscopy shows that the phenyl groups of LCP are oriented epitaxially with layer thickness and an in-plane alignment order much higher than that at the photoirradiated surface can be yielded. The liquid crystal molecules confined between the LCP-coated substrates reveals a stronger correlation among the thermally excited fluctuation modes. Our finding can be used to tailor the boundary forces on alignment substrates and to optimize the device performance.
-
10. Chang-Hong Shen, Jia-Min Shieh, Jung Y. Huang, Hao-Chung Kuo, Chih-Wei Hsu, Bau-Tong Dai, Ching-Ting Lee, Ci-Ling Pan and Fu-Liang Yang : "Inductively coupled plasma grown semiconductor films for low cost solar cells with improved light-soaking stability"---APPLIED PHYSICS LETTERS 99, 033510 (2011).
We investigate the performance of a single-junction amorphous Si (a-Si) solar cell fabricated with inductively coupled plasma (ICP) deposition technique. The high-density plasma resulting from high dissociation capacity of ICP enables good-quality hydrogenated Si films to be synthesized at low temperatures. High-density ICP also promotes the diffusion of reactive radicals on substrates and forms a-Si:H films with low defect density (31015 cm3). We demonstrate single-junction a-Si solar cells with a conversion efficiency of 9.6% and improved light-soaking stability. This low thermal-budget thin-film technique could open up the feasibility of efficient thin film solar cells on flexible substrates.
-
11. Chien Y Lin, Yun H. Wang, Jung Y. Huang, Yongjun Liu and Yiping Zhao : "Impact of electric quadrupolar coupling on the optical response of an array of nano-objects"---J. Phys.: Condens. Matter 22, 225301 (6pp) (2010).
Intra- and inter-particle coupling effects are important but have not been properly taken into account in modeling the optical response of an array of nano-objects. In this paper, we present a method to analyze the impact of electric quadrupolar coupling on the optical response of a layer of silver nanorods fabricated with oblique-angle deposition (OAD). Our technique can render the non-locally coupled nano-objects into an array of coarse-grained induced charges. The retrieved polarizability tensor of the silver nanorods exhibits non-zero off-diagonal components, revealing information about the array structure and inter-particle quadrupolar couplings. Thus, a more transparent picture of the correlation between the function and structure of an optical metamaterial can be yielded.
-
12. Li-Chuan Tang, Yia-Chung Chang, Jung Y. Huang, Ming-Hsien Lee, and Chen-Shiung Chang : "First Principles Calculations of Linear and Second-Order Optical Responses in Rhombohedrally Distorted Perovskite Ternary Halides, CsGeX3 (X = Cl, Br, and I)"---Japanese Journal of Applied Physics 48, 112402-9 (2009).
Systematic studies based on first-principles calculations of second-order optical susceptibilities as well as the dielectric function of CsGeX3 (X = Cl, Br, and I; CGX) are presented. The relationship between structural properties and optoelectronic responses are examined. The structural factors dela, and dGe, dX are proposed to describe the degree of distortion from an ideal perovskite structure. Dela, and dGe increase when halide anions are changed from Cl to I; while halide anion displacement, dX, decreases. The structural distortion effect on these rhombohedral CGX crystals is analyzed by first-principles calculations. The dielectric function and the second harmonic generation (SHG) response coefficient also increase with increasing dela, and dGe. The direct band gaps (EG) of CsGeX3 all occur at the R-point, delER. The experimental band gaps of CGX crystals become smaller, i.e., Eg(CGC)(=3.67 eV) > Eg(CGB)(=2.32 eV) > Eg(CGI)(=1.53 eV), as dela, and dGe increase, i.e., dGe(CGC).
-
13. Li-Chuan Tang, Li-Qiang Liu, Yia-Chung Chang, Jui-hsien Yao, Jung Y. Huang, and Chen-Shiung Chang : "Characterization of Nonlinear Optical Properties of Crystal RbGeCl3.x(H2O) inInfrared Region"---Japanese Journal of Applied Physics 48, 082001-7 (2009).
The nonlinear optical (NLO) property of hydrated rubidium germanium chloride (HRGC), RbGeCl3.x(H2O), is identified. Infrared absorption data support structural evidence that HRGC contain co-ordinated water molecules with strong hydrogen. The infrared spectrum indicated HRGC is transparent in most of the infrared region with only little influence from water. The calculations based on density functional theory shows the band gap of the RbGeCl3 (RGC) crystal is at least 3.84eV, which is larger than that of the infrared (IR) NLO crystal CsGeCl3. Single crystals of HRGC, sized up to 3x2x1 cm3, were grown in aqueous solution by a slow dehydrate technique. The synthetic, structural, and optical properties of an off-centrosymmetric IR nonlinear optical (NLO) RbGeCl3.x(H2O) crystal were investigated experimentally. Powder second harmonic generation (PSHG) measurement indicates that the crystal structure of HRGC becomes off-centrosymmetric. Precise X-ray diffraction measurements shown that [100] family diffraction peaks split slightly. Unlike the RGC crystal structure whose space group is P21m, the HRGC crystal loses the inversion symmetry. Comparisons with known NLO material KH2PO4 (KDP), indicate that HRGCs NLO susceptibility, chi(2), is about one third times that for KDP. The absorption edge of HRGC occured at 310nm (4.0 eV), which indicates NLO HRGC crystal can have larger laser damage threshold. According to the FT IR measurement, HRGC has a transprent range from 0.31 to 30 um, thus it can be applied to wider optical spectrum from ultraviolet, visible, to mid-IR.
-
14. Ching-Wei Chen, Tsung-Ta Tang, Sung-Hui Lin, Jung Y. Huang, Chen-Shiung Chang, Pei-Kang Chung, Shun-Tung Yen, and Ci-Ling Pan : "Optical properties and potential applications of ε-GaSe at terahertz frequencies"---Journal of Opt. Soc. Am. B 26, No. 9, A58-A65 (2009).
Ordinary and extraordinary refractive indices of an e-GaSe crystal at terahertz (THz) frequencies are experimentally determined in this study. Fitting experimental data by THz time-domain spectroscopy (THz-TDS) and a Fourier transform infrared spectrometer (FTIR), we proposed revised complex dielectric functions and Sellmeier equations of GaSe for both ordinary and extraordinary waves from 0.2 to 100 THz. Phonon vibrational modes and overtones in the THz frequency range are examined in detail. The high magnitude of the figure of merit (FOM=103 at 1 THz), the large birefringence (del n=0.76 at 1 THz). and the low absorption coefficient (alpha=0.2 cm-1 at 1 THz) of GaSe are also identified. Potential applications to practical photonic devices such as phase shifters at THz frequencies are proposed.
-
15. Chien Y. Lin, Jien-Hui Li, and Jung Y. Huang : "Retrieval of Liquid Crystal Director Profile from Optical Transmittance Measurements: A Case Study of Inverse-Problem in Optics with Layer Structures"---(unpublished manuscript).
A mathematical inverse problem approach has been developed to retrieve liquid crystal (LC) director profiles from optical transmittance measurements. We propose a new regularization matrix based on a priori knowledge of LC. The method can reliably yield a LC director profile with noisy optical transmittance data in a finite range of incident angle. We demonstrate the functionality by retrieving the liquid crystal director profiles of differently aligned LC cells from experimentally measured data, indicating the method to be useful for the design of LC devices where the LC director profile needed to be carefully tailored.
-
16. Jia-Min Shieh, Wen-Chien Yu, Jung Y. Huang, Chao-Kei Wang, Bau-Tong Dai, Huang-Yan Jhan, Chih-Wei Hsu, Hao-Chung Kuo, and Ci-Ling Pan : "Near Infrared Silicon Quantum Dots MOSFET Photodetector"---Appl. Phys. Lett. 94, 241108 (2009).
A fully silicon-based metal-oxide-semiconductor field-effect transistor is demonstrated for the detection of near-infrared light. Si nanocrystals (nc-Si) are synthesized in the nanopore channels of mesoporous silica (MS) inserted between two oxide layers to form a complete gate structure of polycrystalline Si/SiO2 /nc-Si-in-MS/SiO2 with a polycrystalline Si electrode. Illuminating the gate with near-infrared light, a photoresponsivity as high as 2.8 A/W at 1.55 um can be achieved. The improved photoresponsivity is attributed to from optical transitions via interface states and a current amplification mechanism of the device.
-
17. Liu-Shiaun Li and Jung Y. Huang : "Tailoring Switching Properties of Dipolar Species in Ferroelectric Liquid Crystal with ZnO Nanoparticles"---Journal of Physics D: Applied Physics 42, 125413 (5 pp) (2009).
The capacitance-voltage (C-V) characteristics of surface-stabilized ferroelectric liquid crystal (SSFLC) cells doped with zinc oxide nanocrystals (nc-ZnO) have been studied and fitted to the Preisach model to reveal the behaviors of dipolar species. To explain the experimental results, we propose a physical picture depicting an interaction of nc-ZnO dipole with surrounding SSFLC dipolar species. Our study shows that doping nc-ZnO into FLC not only increases the contrast ratio of the cells by 10 times but also enhances the dynamic polarization of the beneficial dipolar species while minimizes the polarization response of the species with counter effects.
-
18. Jung Y. Huang, Jia-Min Shieh, Hao-Chung Kuo, and Ci-Ling Pan : "“Interfacial polar bonding induced multifunctionality of nano silicon in mesoporous silica"---Adv. Funct. Maters. 19, 1-6 (2009).
Optoelectronic response in a material has spanned a wide range of applications from photon detection to photovoltaic conversion. To conquer the material limitation for better optoelectronic response, nanotechnology had been employed by arranging subunits with specific size-dependent quantum mechanical properties to form a hierarchically organized structure. However, it remains a formidable task to build a functional optoelectronic system from nano objects. Here we report a new artificially engineered optoelectronic material by preferentially growing silicon quantum dots on the bottom of the pore-channels of mesoporous silica. The self-assembled nanostructured material can yield an enhanced optoelectronic response over that of silicon crystal. The improvement was shown to originate from highly stable polar layers lying between silicon quantum dots and mesoporous silica, verified by infrared-visible sum frequency vibrational spectroscopy. The interfacial polar structures exhibit a strong photoexcited carrier-phonon coupling and a ferroelectric-like hysteretic switching property. Thus a new class of multifunctional materials can be realized with a design concept that employs semiconductor nanocrystals for optical sensing and utilizes interfacial polar layers to facilitate the carrier transport and emulate ferroelectric-like switching.
-
19. Jia-Min Shieh, Jung Y. Huang, Jian-Da Huang, Yi-Chao Wang, Jin-Wei Chen, Chao-Kei Wang, An-Thung Cho, Hao-Chung Kuo, Bau-Tong Dai, and Ci-Ling Pan : "Nonvolatile Memory with Switching Interfacial Polar Structures of Nano Si-in-Mesoporous Silica"---Appl. Phys. Lett. 95, 143501 (2009) (Cover Page of the October issue, 2009).
We show an artificially engineered electret with Si nanocrystals embedded in mesoporous silica for non-volatile memory. We attribute the polarization to from polar layers lying at the interfaces between one-side bonded Si nanocrystals and mesoporous silica matrix. Under external field, the Si nanocrystals could be displaced in the porechannels causing displaced charge distributions and therefore a field-controllable electric polarization. Non-volatile memory is demonstrated with a metal-oxide-semiconductor field-effect transistor.
-
20. Yuen H. Wang and Jung Y. Huang : "Probing the electric-field modulated ferroelectric liquid crystal films with phase-sensitive Raman imaging technique"---The Open Optics Journal 3, 12-18 (2009).
The electric-field-induced modulation of surface stabilized ferroelectric liquid crystal (SSFLC) films was investigated with a phase sensitive Raman imaging. We found the technique not only effectively suppresses the nonresonant background of a Raman spectrum, but also yields an insight into the modulated amplitudes and phases of Raman peaks. By using the technique, the electro-optical switching SSFLC film doped with ZnO nanocrystals (nc-ZnO) was shown to switch in a more organized way and be less sensitive to the modulation induced disordering than a undoped SSFLC film. Furthermore, the method can be implemented in a conventional Raman spectroscopy to enable researchers probing into the spatial distribution and modulation dynamics of electro-optic active species in a complex thin film.
-
21. Chun-Ting Lin, Yang-Tung Huang, and Jung Y. Huang : "Quantitative Analysis of a Flat-Top Planar Waveguide Demultiplexer"---IEEE Journal of Lightwave Technology, 27, No. 5, 552-558 (2009).
A three-focal-point method is used for the design of a flat-top planar waveguide concave grating. With the Gaussian approximation a modified formula is proposed and is compared with the numerical model of the scalar diffraction theory by using a design example. The sources of loss caused by the flat-top design and the grating are taken into consideration. The optimal separation between the two outmost focal points is obtained and the spectral response of the demultiplexer with a ripple below 0.04 dB is achieved.
-
22. Chun-Ting Lin, Yang-Tung Huang, and Jung Y. Huang : "A planar waveguide concave grating employing dielectric mirrors"---Optics Communication 281, 1072-1076 (2008).
Dielectric mirrors, which yield high-reflectances on grating facets, are proposed for the design of a planar waveguide concave grating. The transfer-matrix method is used to derive an expression for the reflectance of a series of air slots and high-index stacks. The Full-WAVE software, a finite difference time-domain EM solver from R-Soft, is used to evaluate the loss of the resulting 2D waveguide grating. The simulation results show that the polarization-dependent loss (PDL) is below 0.25 dB when the proposed dielectric mirror is used. The influence of the width variation of the dielectric stack is also taken into account.
-
23. Jung Y. Huang, Liu S. Li, and Ming C. Chen : "Molecular Binding Effect Resulting from a Doping of ZnO Nanocrystals in Surface-Stabilized Ferroelectric Liquid Crystal"---Journal of Physical Chemistry C, 112, 5410-5415 (2008).
In this paper, we reported that doping ferroelectric liquid crystal (FLC) with ZnO nanocrystals can improve the ordered structure of a surface stabilized FLC (SSFLC) and leads to an increase in the optical transmittance by a factor of 2.6 than that of a SSFLC cell without doping. Two-dimensional infrared (2D IR) correlation technique revealed that the ZnO nanocrystals were uniformly dispersed into the FLC medium. This uniform dispersion yields stronger correlations among the IR-active modes of FLC molecules, which then results in a more concerted reorientation dynamics at the molecular segments level. A molecular binding effect originating from a dipole interaction of a ZnO nanodot with surrounding C=O groups of FLC molecules was proposed. The energy reduction induced by the doping was estimated to be about 1000 J/m3.
-
24. Ching-Wei Chen, Yu-Shian Lin, Jung Y. Huang, Chen-Shiung Chang, Ci-Ling Pan, Li Yan, and Chao-Kuei Lee : "Generation and spectral manipulation of coherent terahertz radiation with two-stage optical rectification"---Optics Express 16, Issue 18, 14294-14303 (10 pages) (2008).
We propose and experimentally demonstrate the generation of single-cycle terahertz radiation with two-stage optical rectification in GaSe crystals. By adjusting the time delay between the pump pulses employed to excite the two stages, the terahertz radiation from the second GaSe crystal can constructively superpose with the terahertz field injected from the first stage. The high mutual coherence between the two terahertz radiation fields is ensured with the coherent optical rectification process and can be further used to synthesize a desired spectral profile of coherent THz radiation. The technique is also potentially useful for generating high-power single-cycle terahertz pulses, usually limited by the pulse walk-off effect of the nonlinear optical crystal used.
-
25. Kuang-Yao Lo, Shih-Chieh Lo, Chang-Feng Yu, Jung Y. Huang, Yi-Jen Huang, Ren-Chuan Chang, and Sheng-Yuan Chu : "Optical second harmonic generation from the twin boundary of ZnO thin films grown on Silicon"---Appl. Phys. Lett. 92, 091909 (2008).
The symmetry of the twin boundaries of ZnO epitaxial film were detected with reflective second harmonic generation (RSHG). The twin boundaries exhibit mirror symmetry with a polar configuration across the boundary plane and yield a nonvanishing polar contribution to RSHG. The nonvanishing second order susceptibility supports the notion that the measured RSHG originates from the planar defect, which depends on the residual stress in the thin film. We successfully analyzed our RSHG result by correlating the macroscopic data from optic probe with the microscopic data from TEM.
-
26. Yiming Li, Jung Y. Huang, and Bo-Shian Lee : "Effect of the single grain boundary position on surrounding-gate polysilicon thin film transistors"---Semicond. Sci. Technol. 23, 015019 (2008).
In this paper, single-grain-boundary (GB)-position-induced electrical characteristic variations in 300 nm surrounding-gate (i.e., gate-all-around (GAA)) polysilicon thin film transistors (TFTs) are numerically investigated. For a 2T1C active-matrix circuit, a three-dimensional device–circuit coupled mixed-mode simulation shows that the switching speed of GAA TFT can be improved by nine times, compared with the result of the circuit using single-gate (SG) polysilicon TFTs. The position of a single GB near the drain side has an bad effect on device performance, but the influence can be suppressed in the GAA polysilicon TFTs. We found that under the same threshold voltage, the variation of the threshold voltage can be reduced from 15% to 5%, with varying gate structures of the GAA polysilicon TFT.
-
27. Chun-Ting Lin, Yang-Tung Huang, and Jung Y. Huang : "The Impact of Fabrication Errors on a Flat-Top Grating-Based Planar Waveguide Demultiplexer"---Japanese Journal of Applied Physics 46, Issue 11, 7356-7357 (2007).
The spectral performance of a demultiplexer is significantly affected by the phase and amplitude errors due to fabrication errors. We estimate the impact of fabrication errors on a flat-top grating-based planar waveguide demultiplexer using a design example. Simulation results show that the photomask resolution resulting in a phase error should be lower than 40 nm when a crosstalk criterion of -30 dB is given. The impact of amplitude errors is not distinct until the reduced amount of the facet width is greater than 0.5 mm and the grating side-wall angle offset from the vertical is larger than 1 degree.
-
28. Kuang Yao Lo, Yi Jen Huang, Jung Y. Huang, Zhe Chuan Feng, William E. Fenwick, Ming Pan and Ian T. Ferguson : "Reflective Second Harmonic Generation from ZnO thin films: a study on the Zn-O bonding"---Appl. Phys. Lett. 90, Issue 16, 161904 (3 pages)(2007).
Zn-O bonding in ZnO (0002) thin films by metalorganic chemical vapor deposition have been studied by reflective second harmonic generation (RSHG). The polar Zn-O bond on the top layer is not cancelled out and presents 3mm symmetrical structures on the well-grown ZnO (0002) surface. The average polar strength of the Zn-O bond is correlated with the film quality. The mirror symmetry, caused by the non-vanished polar of twin boundary, is analyzed using s-polarized RSHG with s-polarized fundamental light irradiation. These results demonstrate that the Zn-O heteropolar bonds on the smooth ZnO surface contribute to the SHG intensity.
-
29. Jia-Min Shieh, Yi-Fan Lai, Wei-Xin Ni, Hao-Chung Kuo, Chih-Yao Fang, Jung Y. Huang, and Ci-Ling Pan : "Enhanced photoresponse of a metal-oxide-semiconductor photodetectorwith silicon nanocrystals embedded in the oxide layer"---Appl. Phys. Lett. 90, 051105 (2007).
The authors report a two-terminal metal-oxide-semiconductor photodetector for which light is absorbed in a capping layer of silicon nanocrystals embedded in a mesoporous silica matrix on p-type silicon substrates. Operated at reverse bias, enhanced photoresponse from 300 to 700 nm was observed. The highest optoelectronic conversion efficiency is as high as 200%. The enhancements were explained by a transistorlike mechanism, in which the inversion layer acts as the emitter and trapped positive charges in the mesoporous dielectric layer assist carrier injection from the inversion layer to the contact, such that the primary photocurrent could be amplified.
-
30. Chung-Ping Li, Chia-Hao Wu, Kung-Hwa Wei, Jeng-Tzong Sheu, J. Y. Huang, U-Ser Jeng and Keng S. Liang : "The Effect of Nanoscale Confinement on the Collective Electron Transport Behavior in Au Nanoparticles Self-Assembled in a Nanostructured Poly(styrene-b-4-vinylpyridine) Diblock Copolymer Ultra Thin Film"---Advanced Functional Materials 17, 2283-2290 (2007).
This study involves the collective electron transport behavior of sequestered Au nanoparticles in a nanostructured poly(styrene-b-4-vinylpyridine). We prepared monolayer thin films (ca. 30 nm) consisting of Au nanoparticles self-assembled in the 30-nm spherical poly(4-vinylpyridine) domains of a poly(styrene-b-4-vinylpyridine) diblock copolymer. From the current–voltage characteristics of these thin films, we found that the collective electron transport behavior of Au nanoparticles sequestered in the spherical poly(4-vinylpyridine) nanodomains was dictated by Coulomb blockade and was quasi one-dimensional, as opposed to the three-dimensional behavior displayed by Au nanoparticles that had been dispersed randomly in homo-poly(4-vinylpyridine). The threshold voltage of these composite increased linearly upon increasing the inter-nanoparticle distance. The electron tunneling rate constant in the case of Au nanoparticles confined in poly(4-vinylpyridine) nanodomains is eight times larger than that in the randomly distributed case and it increases upon increasing the amount of Au nanoparticles. This phenomenon indicates that manipulating the spatial arrangement of metal nanoparticles by diblock copolymer can potentially create electronic devices with higher performance.
-
31. Ching-Wei Chen, Yu-Kuei Hsu, J. Y. Huang, C. S. Chang, and Ci-Ling Pan, Jing-Yuan Zhang : "Generation Properties of Coherent Infrared Radiation in the Optical Absorption Region of GaSe Crystal"---Optics Express 14, No. 22, 10636-10644 (2006).
We report a study of the generation properties of coherent infrared radiation from mid-IR to THz region from GaSe crystal. The infrared-active modes of ?-GaSe crystal at 236 cm-1 and 214 cm-1 were found to be responsible for the observed optical dispersion and infrared absorption edge. Based upon the study of GaSe DFG, new Sellmeier equations were proposed to accurately reflect the optical dispersion of GaSe in this spectral region. The output THz power variation with wavelength can be properly explained with a decrease of parametric gain and the spectral profile of absorption coefficient of GaSe. The effect of infrared absorption on difference-frequency generation (DFG) process can be reduced by doping GaSe crystal with erbium ions and results in an increase in the IR output of the DFG device.
-
32. Ching-Wei Chen, Jung Y. Huang and Ci-Ling Pan : "Pulse retrieval from interferometric autocorrelation measurement by use of the population-split genetic algorithm"---Optics Express 14, No. 22, 10930-10938 (2006).
Abstract Text to be Inserted.
-
33. Yu-Kuei Hsu, Ching-Wei Chen, Jung Y. Huang, Jing Y. Zhang, Ci-Ling Pan, and C. S. Chang : "Erbium doped GaSe crystal for mid-IR applications"---Optics Express 14, 5484-5491 (2006).
Abstract Text to be Inserted.
-
34. Jung Y. Huang and Wen T. Shih : "Probing the field-induced submolecular motions in a ferroelectric liquid crystal mixture with time-resolved two-dimensional infrared spectroscopy"---J. Phys. C: Condens. Matter 18, 7593–7603 (2006).
Abstract Text to be Inserted.
-
35. Chung-Ping Li, Kung-Hwa Wei and Jung Y. Huang : "Enhanced Collective Electron Transport by CdSe Quantum Dots Self-Assembled in the Poly(4-vinylpyridine) Nanodomains of a Poly(styrene-b-4-vinylpyridine) Diblock Copolymer Thin Film"---Angewandte Chemie International Edition 45, 1-5 (2006).
Abstract Text to be Inserted.
-
36. Chung-Ping Li, Siao-Wei Yeh,Han-Chang Chang, Jung Y. Huang, and Kung-Hwa Wei : "The Orientation of CdSe Nanorods Affects the Electron Mobility of CdSe/P4VP Nanodomains Self-Assembled within a Poly(styrene-b-4-vinylpyridine) Diblock Copolymer Thin Film"---Small 2, 359-363 (2006).
Abstract Text to be Inserted.
-
37. Chia-Hung Chou, Hsu-Shen Wang, Kung-Hwa Wei and Jung Y. Huang : "Thiophenol-modified CdS nanoparticles enhance the luminescence of benzoxyl dendron-substituted polyfluorene copolymers"---Advanced Functional Materials 16, 909 (2006).
Abstract Text to be Inserted.
-
38. Chin-Cheng Weng, Chia-Hung Chou, Kung-Hwa Wei, and Jung Y. Huang : "Enhanced Electroluminescence of Poly(2-methoxy-5-(20-ethylhexyloxy)-1,4-phenylene vinylene) Films in the Presence of TiO2 Nanocrystals"---Journal of Polymer Research 13, 229 (2006).
Abstract Text to be Inserted.
-
39. L. C. Tang, Jung Y. Huang, C. S. Chang, M. H. Lee, and L. Q. Liu : "New infrared nonlinear optical crystal CsGeBr3: synthesis, structure and powder second-harmonic generation properties"---J. Phys. C: Condens. Matter 17, 7275–7286 (2005).
Abstract Text to be Inserted.
-
40. Ming C. Chen, Jung Y. Huang, Qiantso Yang, C. L. Pan, and Jen-Inn Chyi : "Freezing phase scheme for fast adaptive control and its application to characterization of femtosecond coherent optical pulses reflected from semiconductor saturable absorber mirrors"---J. Opt. Soc. Am. B 22, 1134-1142 (2005).
Abstract Text to be Inserted.
-
41. M. Z. Chen, Jung Y. Huang, and Li. J. Chen : "Coherent control multiphoton processes in semiconductor saturable Bragg reflector with freezing phase algorithm"---Appl. Phys. B 80, 333–340 (2005).
Abstract Text to be Inserted.
-
42. Wen-Tse Shih, Jung Y. Huang, and Jing Y. Zhang : "Field-induced re-orientation dynamics of surface stabilized ferroelectric liquid crystal mixture"---Liquid Crystals 31, 1-9 (2004).
Abstract Text to be Inserted.
-
43. Chao-Kuei. Lee, J. -Y. Zhang, J. Y. Huang and Ci-Ling Pan : "Theoretical and experimental studies of tunable UV/blue femtosecond pulses in a 405-nm pumped type-I b-BaB2O4 non-collinear optical parametric amplifier"---J. Opt. Soc. Am. B21, 1494-1499 (2004).
Abstract Text to be Inserted.
-
44. Jing-yuan Zhang, Chao-Kuei Lee, Jung Y. Huang, and Ci-Ling. Pan : "Sub femto-joule sensitive single-shot OPA-XFROG and its application in study of white-light supercontinuum generation"---OPTICS EXPRESS 12, 574-581 (2004).
Abstract Text to be Inserted.
-
45. L. C. Tang, M. H. Lee, C. H. Yang, Jung Y. Huang, and C. S. Chang : "Cation substitution effects on structural, electronic, and optical properties of nonlinear optical AgGaSxSe1-x crystals"---J. Phys. C: Condens Matter 15, 6043-6055 (2003).
Abstract Text to be Inserted.
-
46. C. K. Lee, J. -Y. Zhang, Jung Y. Huang and C. L. Pan : "Generation of femtosecond Laser Pulses Tunable from 380 nm to 465 nm via cascaded Sum-Frequency Generation and Optical Parametric Amplification with a type-I Non-collinearly Phase Matched BBO Crystal"---Optics Express 11, pp. 1702-1708 (2003).
Abstract Text to be Inserted.
-
47. J. L. He, Chao-Kuei Lee, Jung Y. Huang, S. C. Wang, Ci-Ling Pan, and K. F. Huang : "Diode-pumped passively mode-locked multi-watt Nd:GdVO4 Laser with a Saturable Bragg Reflector"---Appl. Opt. 42, No. 27, 5496 (2003).
Abstract Text to be Inserted.
-
48. R. P. Pan, H. Y. Chin, Y. F. Lin, and Jung Y. Huang : "Surface topography and alignment effects in UV-modified polyimide films with microsize patterns"---Chin. J. Phys. 41, 77-184 (2003).
Abstract Text to be Inserted.
-
49. Jung Y. Huang, Li-Chuan Tang, and M. H. Lee : "ab initio Study of the structural and optical properties of orthorhombic ternary nitrides"---J. Phys: Condensed Phys. 13 (2001) 10417.
Abstract Text to be Inserted.
-
50. S. S. Ju, T. D. Wu, Y. L. Yeh, T. H. Wei, Jung Y. Huang, and S. H. Lin : "Sum-frequency vibrational spectroscopy of the liquid-air interface of aqueous solutions of ethanol in the OH region"---J. Chinese Chem. Soc. 48, 625-629 (2001).
Abstract Text to be Inserted.
-
51. Li-Chuan Tang, Chen-Shiung Chang, and Jung Y. Huang : "Electronic Band Structures and Optical Properties of Cesium Germanium (II) Iodine (CsGeI3) Crystal"---J. Physics C, Vol.12, 9129 (2000).
Abstract Text to be Inserted.
-
52. W. K. Chen, C. M. Cheng, Jung Y. Huang, W. F. Hsieh, and T. Y.Tseng : "Study of linear and nonlinear optical properties of distorted Ti-O6 perovskite structure in BaxSr1-xTiO3"---J. Phys. Chem. of Solids 61, 969-977 (2000).
Abstract Text to be Inserted.
-
53. P. K. Yang and Jung Y. Huang : "An inexpensive diode-pumped mode-locked Nd:YVO4 laser for nonlinear optical microscopy"---Opt. Commun. 173, 315-321 (2000).
Abstract Text to be Inserted.
-
54. P. K. Yang and Jung Y. Huang : "Model-independent maximum-entropy method for the analysis of sum-frequency vibrational spectroscopy"---J. Opt. Soc. Am. B 17, 1216-1222 (2000).
Abstract Text to be Inserted.
-
55. Pao-Keng Yang, Jung Y. Huang, and Jwo-Huei Jou : "Aligning Mechanism of an In Situ Poled Nonlinear Optical Polymer"---Proc. of NSC A 24, 310-315 (2000).
Abstract Text to be Inserted.
-
56. R. Edgar, Jung Y. Huang, R. Popovitz-Biro, K. Kjaer, W. G. Bouwman, P. B. Howes, J. Als-Nielsen, Y. R. Shen, M. Lahav, and L. Leiserowitz : "The Absolute Orientation of Molecules of Amphiphilic Alcohols in Crystalline Monolayers"---J. Physical Chem. B 104, 6843-6850 (2000).
Abstract Text to be Inserted.
|
Abstract
PDF