Prof. Ta-Jen Yen Profile

Prof. Ta-Jen Yen

Professor at National Tsing Hua Univ

SPIE Involvement:

Conference Program Committee | Author

Publications (31)

Proceedings Article | 13 March 2024 Poster

Achieving highly directive perfect absorber and emitter in the mid-infrared region based on the generalized Kerker condition

Hao-Yuan Tsai, Che-Chin Chen, Chun-Yen Chen, Wei-Cheng Lin, Ta-Jen Yen

Proceedings Volume PC12896, PC128961F (2024) https://doi.org/10.1117/12.3001189

KEYWORDS: Mid-IR, Split ring resonators, Metamaterials, Absorption, Infrared radiation, Emissivity, Backscatter, Visualization, Reflectivity, Receivers

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Proceedings Article | 5 October 2023 Poster + Paper

Novel high entropy alloy (AgAlCuNiTi) hybridized MoS2/Si nanowires heterostructure with plasmonic enhanced photocatalytic activity

Yu-Hsuan Cheng, Ta-Jen Yen

Proceedings Volume 12648, 126480C (2023) https://doi.org/10.1117/12.2676326

KEYWORDS: Molybdenum, Hydrogen, Alloys, Nanowires, Silver, Silicon, Plasmonics, Optical properties, Photocurrent, Heterojunctions

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Hydrogen has garnered widespread attention as a pivotal indicator for future sustainable development. Current research aims to utilize clean energy for hydrogen production, thereby minimizing the generation of by-products such as hydrocarbons. Two-dimensional molybdenum disulfide (2D-MoS₂) has demonstrated outstanding photoelectrocatalytic (PEC) performance and shows promise as a material for photocatalytic (PC) hydrogen evolution (HER). However, its atomic-scale thickness limits light absorption. Therefore, the introduction of plasmonic metal nanoparticles to enhance light-matter interactions through the plasmonic resonance effect can substantially improve the overall catalytic efficiency. Conventional single-element noble metal nanoparticles exhibit relatively poor catalytic effects, while multi-element alloys have emerged as excellent catalysts due to their high entropy effect. In this study, we designed a heterostructure (SiNW/MoS₂/HEANP) by combining silicon nanowires, molybdenum disulfide, and a novel high-entropy alloy nanoparticle to demonstrate outstanding photocatalytic hydrogen evolution performance. The silicon nanowire structure, exploiting light-trapping effects, exhibited high anti-reflection properties, achieving over 97% absorption of visible light and providing abundant reaction sites. Moreover, the mixed-phase structure of 1T and 2H MoS₂, synthesized via thermal pyrolysis, contributed to the enhanced HER performance of the material. The HEA(AgAlCuNiTi) nanoparticles, synthesized through sputtering and annealing, exhibited a significant synergistic effect with MoS₂ through its decent plasmonic resonance and excellent HER activity, resulting in a substantially improved overall catalytic efficiency. The SiNW/MoS₂/HEANP heterostructure demonstrated a remarkable hydrogen generation rate of 475.5 mmol g-1 h-1. This study presents a strategy for utilizing HEAs as promising materials for photocatalytic hydrogen evolution with tremendous potential.

Proceedings Article | 5 October 2023 Presentation + Paper

MoS2 plasmonic grating integrated indium selenide for polarization-sensitive multi-band photodetection in near-infrared

Yu-Te Chu, Ta-Jen Yen

Proceedings Volume 12648, 1264809 (2023) https://doi.org/10.1117/12.2676241

KEYWORDS: Photodetectors, Molybdenum, Optical gratings, Near infrared, Plasmonics, Polarization gratings, Gold, Absorption, Light absorption

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Proceedings Article | 5 October 2023 Presentation + Paper

Active spatially reconfigurable mid-infrared polarization modulation with a vertical split-ring resonator array

Chun-Yen Chen, Che-Chin Chen, Takuo Tanaka, Ta-Jen Yen

Proceedings Volume 12648, 1264805 (2023) https://doi.org/10.1117/12.2676663

KEYWORDS: Polarized light, Polarization, Split ring resonators, Wave plates, Reflection, Incident light, Gold, Terahertz radiation, Mid-IR, Polarizers

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Proceedings Article | 5 October 2023 Presentation

Plasmonic photodetectors with superior optoelectronic performance demonstrated in MIR, visible and UV regions

Ta-Jen Yen, Shyam Narayan Singh Yadav, Ching-Han Mao, Yu-Ping Kuang, Shangjr Gwo, Chang Hua Liu, Yu-Jung Lu

Proceedings Volume PC12648, PC1264815 (2023) https://doi.org/10.1117/12.2676799

KEYWORDS: Photodetectors, Plasmonics, Ultraviolet radiation, Visible radiation, Optoelectronics, Silver, Silicon, Semiconductor materials, Plasmonic sensors, Perovskite

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Proceedings Article | 5 October 2023 Presentation

A low-cost, highly stable, superior-efficient heterogeneous photocatalyst by the synergetic hybrid of 2D-MoS2 nanofilms, 1D-Si nanowires, 0D Au nanoparticles for solar-driven hydrogen evolution

Ta-Jen Yen, Chun-Yen Chen, Takuo Tanaka

Proceedings Volume PC12663, PC126630F (2023) https://doi.org/10.1117/12.2677380

KEYWORDS: Nanowires, Hydrogen, Nanofilms, Gold nanoparticles, Silicon, Gold, Light absorption, Antireflective coatings, Visible radiation, Transition metals

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Proceedings Article | 3 October 2022 Presentation

Two UV plasmonic devices by high-performance epitaxial Al metasurfaces: an ultrasensitive photodetector and a surface-enhanced resonance Raman spectroscopic (SERRS) biosensor

Abhishek Dubey, Ragini Mishra, Yu-Hung Hsieh, Chang Wei Cheng, Bao-Hsien Wu, Lih-Juann Chen, Shangjr Gwo, Ta-Jen Yen

Proceedings Volume PC12197, PC1219708 (2022) https://doi.org/10.1117/12.2647388

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Proceedings Article | 17 September 2018 Presentation

Study on symmetry breaking in vertical double split ring resonators (Conference Presentation)

Hao-Yuan Tsai, Che-Chin Chen, Ta-Jen Yen

Proceedings Volume 10719, 107191F (2018) https://doi.org/10.1117/12.2320257

KEYWORDS: Split ring resonators, Metamaterials, Metals, Resonators, Electromagnetic radiation, Magnetism, Finite element methods, Printing, Electron beam lithography, Silicon

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Proceedings Article | 21 February 2018 Paper

Efficient pattern modeling of plasmonic nanostructures probed by nanoscale near-field scanning microscope tips with different polarized outputs

Pi-Ju Cheng, Ruei-Han Jiang, Chi Chen, Ta-Jen Yen, Shu-Wei Chang

Proceedings Volume 10541, 1054124 (2018) https://doi.org/10.1117/12.2288321

KEYWORDS: Nanostructures, Plasmonics, Near field scanning optical microscopy, Near field, Metals, Near field optics, Solids, Gold, Finite element methods, Glasses

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Proceedings Article | 29 September 2017 Presentation

A three-dimensional negative index medium and a miniature surface plasmon polariton amplitude modulator (Conference Presentation)

Ta-Jen Yen, Chu-En Lin, Chih-Jen Yu, Tsung-Yu Huang, Ting-Tso Yeh, Cheng-Wei Chang

Proceedings Volume 10346, 103461X (2017) https://doi.org/10.1117/12.2277112

KEYWORDS: Plasmonics, Surface plasmon polaritons, Modulators, Gold, Modulation, Polarization, Split ring resonators, Terahertz radiation, Ultraviolet radiation, Lithography

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Proceedings Article | 8 June 2017 Presentation

Experimentally demonstrate the surface state and optical topological phase transition of one dimensional hyperbolic metamaterials in Otto and KR configuration (Conference Presentation)

Chih Chung Wei, Leng-Wai Un, Ta-Jen Yen

Proceedings Volume 10227, 102270F (2017) https://doi.org/10.1117/12.2264961

KEYWORDS: Current controlled current source, Dielectrics, Metamaterials, Plasmonics, Nonlinear optics, Optical properties, Binary data, Surface plasmons, Light sources, Reflectivity

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Proceedings Article | 16 September 2016 Presentation + Paper

A single dielectric nanolaser

Tsung-Yu Huang, Ta-Jen Yen

Proceedings Volume 9918, 99180V (2016) https://doi.org/10.1117/12.2237437

KEYWORDS: Dielectrics, Optical spheres, Magnetism, Mie scattering, Terahertz radiation, Absorption, Surface plasmon polaritons, Scattering, Plasmonic nanolaser, Ions

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Proceedings Article | 15 September 2016 Presentation + Paper

High-efficiency and high-resolution apertureless plasmonic near-field probe under internal illumination

R. H. Jiang, H. C. Chou, J. Y. Chu, C. Chen, T. J. Yen

Proceedings Volume 9925, 992509 (2016) https://doi.org/10.1117/12.2237854

KEYWORDS: Metals, Plasmonics, Near field scanning optical microscopy, Surface plasmons, Spatial resolution, Finite-difference time-domain method, Near field, Near field optics, Silica, Gold

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Proceedings Article | 15 October 2012 Paper

A terahertz-wave subwavelength polarization rotator based on metamaterials

Yi-Ju Chiang, Ta-Jen Yen

Proceedings Volume 8496, 84960M (2012) https://doi.org/10.1117/12.929406

KEYWORDS: Polarization, Terahertz radiation, Strontium, Metamaterials, Positron emission tomography, Dielectric polarization, Dielectrics, Constructive interference, Split ring resonators, Resonators

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Proceedings Article | 15 October 2012 Paper

An innovative cloak enables arbitrary multi-objects hidden with visions and movements

Tsung-Yu Huang, Hsin-Cheng Lee, Ieng-Wai Un, Ta-Jen Yen

Proceedings Volume 8455, 84551P (2012) https://doi.org/10.1117/12.929339

KEYWORDS: Scattering, Metamaterials, Sensors, Optics manufacturing, Electromagnetism, Metals, Wavefronts, Reflection, Free space optics, Free space

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Proceedings Article | 24 May 2011 Paper

A high-transmission dualband terahertz bandpass filter by exciting multiresonance of metamaterials

Y. Chiang, T. Yen

Proceedings Volume 8070, 80700V (2011) https://doi.org/10.1117/12.888374

KEYWORDS: Terahertz radiation, Metamaterials, Bandpass filters, Composites, Optical filters, Neodymium, Modulation, Electromagnetism, Ions, Optical components

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Proceedings Article | 18 May 2011 Paper

Slowing light in all dielectric tapered left-handed waveguide

Tsung-Yu Huang, Yue-Jun Lai, Ta-Jen Yen

Proceedings Volume 8070, 80700J (2011) https://doi.org/10.1117/12.888563

KEYWORDS: Dielectrics, Waveguides, Metamaterials, Metals, Photons, Transmittance, Surface plasmon polaritons, Microwave radiation, Zirconium dioxide, Optical switching

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Proceedings Article | 7 May 2011 Paper

Enhanced sensitivity of localized surface plasmon resonance biosensor by phase interrogation

Chung-Tien Li, How-foo Chen, Ta-Jen Yen

Proceedings Volume 8073, 80730K (2011) https://doi.org/10.1117/12.887139

KEYWORDS: Surface plasmons, Gold, Nanoparticles, Biosensors, Nanostructures, Metals, Phase shifts, Polarization, Optical resolution, Plasmonics

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Proceedings Article | 11 September 2010 Paper

A three-dimensional negative refractive index medium operated at multiple-angle incidences

Ting-Tzuo Yeh, Ta-Jen Yen

Proceedings Volume 7754, 77541U (2010) https://doi.org/10.1117/12.862500

KEYWORDS: Terahertz radiation, Metamaterials, Refractive index, Magnetism, Polarization, Neodymium, Transmittance, Negative refraction, Composites, Ions

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Proceedings Article | 11 September 2010 Paper

Experimental demonstration of slowing light by oscillatory mode in left-handed waveguides

Tsung-Yu Huang, Tien-Chung Yang, Ta-Jen Yen

Proceedings Volume 7754, 775411 (2010) https://doi.org/10.1117/12.862495

KEYWORDS: Waveguides, Metamaterials, Transparency, Polaritons, Cladding, Plasma, Slow light, Electromagnetism, Light wave propagation, Radio propagation

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Proceedings Article | 11 September 2010 Paper

A compact transmission-line metamaterial bandpass filter with ultra-wide-bandwidth for 60 GHz application

Ai-Ping Yen, Ta-Jen Yen

Proceedings Volume 7754, 77542I (2010) https://doi.org/10.1117/12.863882

KEYWORDS: Resonators, Bandpass filters, Metamaterials, Wireless communications, Microwave radiation, Signal attenuation, Capacitors, Copper, Telecommunications, Composites

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Proceedings Article | 11 September 2010 Paper

Slowing down the light by using coupled stereoscopic dielectric metamaterials

Cheng-Kuang Chen, Ta-Jen Yen

Proceedings Volume 7754, 775412 (2010) https://doi.org/10.1117/12.861138

KEYWORDS: Dielectrics, Metamaterials, Resonators, Transparency, Magnetism, Solids, Transmittance, Chemical species, Absorption, Microwave radiation

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Proceedings Article | 17 May 2010 Paper

Green laser excited surface plasmon resonance biosensor utilizing highly sensitive phase interrogation detection

How-Foo Chen, Wei-Chen Hsu, Ya-Jung Wang, Ta-Jen Yen

Proceedings Volume 7715, 77150O (2010) https://doi.org/10.1117/12.854857

KEYWORDS: Gold, Biosensors, Light wave propagation, Surface plasmons, Refractive index, Interfaces, Spatial resolution, Thin films, Biosensing, Prisms

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Proceedings Article | 29 April 2010 Paper

A scalable multi-allowed band bandpass filter demonstrating ultra-wide-bandwidth, excellent efficiency, and sharp band-edge transition

Tsung-Yu Huang, Ta-Jen Yen

Proceedings Volume 7711, 77111H (2010) https://doi.org/10.1117/12.852409

KEYWORDS: Bandpass filters, Transmittance, Metamaterials, Video, Magnetism, Reflectivity, Dielectrics, Phase velocity, Plasmonics, Wireless communications

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Proceedings Article | 2 September 2009 Paper

Plasmonic couplings in split-ring resonators by electric excitation

Chia-Yun Chen, Ta-Jen Yen

Proceedings Volume 7392, 73921H (2009) https://doi.org/10.1117/12.826689

KEYWORDS: Plasmonics, Electromagnetism, Terahertz radiation, Split ring resonators, Refractive index, Transparency, Metamaterials, Magnetism, Nanostructures, Transmittance

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Proceedings Article | 21 August 2009 Paper

Enhanced sensitivity by optimizing metal thicknesses in intensity-interrogation surface plasmon resonance biosensors

Chung-Tien Li, Ta-Jen Yen

Proceedings Volume 7397, 739716 (2009) https://doi.org/10.1117/12.826826

KEYWORDS: Metals, Biosensors, Gold, Mirrors, Glucose, Surface plasmons, Resonance enhancement, Refractive index, Reflectivity, Off axis mirrors

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Proceedings Article | 12 May 2009 Paper

A quasi-quantitative demonstration of multi-mode refractive index sensors based on standing-wave plasmonic resonances in split ring resonators

Yun-Tzu Chang, Ta-Jen Yen

Proceedings Volume 7353, 735315 (2009) https://doi.org/10.1117/12.820537

KEYWORDS: Dielectrics, Sensors, Plasmonics, Refractive index, Split ring resonators, Reflectivity, Optical sensors, Water, Terahertz radiation, Biosensing

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Proceedings Article | 4 May 2007 Paper

Numerical modeling of pseudo-isotropic negative refractive index media

Tien-Chung Yang, Yu-Hang Yang, Ta-Jen Yen

Proceedings Volume 6581, 65810Y (2007) https://doi.org/10.1117/12.722725

KEYWORDS: Magnetism, Refractive index, Negative refraction, Metamaterials, Electromagnetism, Transmittance, Reflectivity, Numerical modeling, Numerical simulations, Copper

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Proceedings Article | 25 March 2005 Paper

Infrared spectroscopy and ellipsometry of magnetic metamaterials

Willie Padilla, Ta-Jen Yen, Nicholas Fang, David Vier, David Smith, John Pendry, Xiang Zhang, D. Basov

Proceedings Volume 5732, (2005) https://doi.org/10.1117/12.581787

KEYWORDS: Magnetism, Reflectivity, Terahertz radiation, Metamaterials, Electromagnetism, Quartz, Ellipsometry, Copper, Infrared spectroscopy, Polarization

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