Mr. Younghwan Yang Profile

Younghwan Yang

at Pohang Univ of Science and Technology

SPIE Involvement:

Author

Publications (19)

Proceedings Article | 6 October 2023 Poster

Gap-plasmon-driven liquid-crystal integrated chiral metasurface for intensity tunable hologram at the visible frequencies

Younghwan Yang, Hongyoon Kim, Junsuk Rho

Proceedings Volume PC12646, PC126461N (2023) https://doi.org/10.1117/12.2672556

KEYWORDS: Liquid crystals, Reflection, Polarization, Holography, Holograms, Dichroic materials, Split ring resonators, Polarized light, Nanostructures, Visible radiation

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Proceedings Article | 6 October 2023 Poster

Structural coloration using bandgap engineered, low-optical losses hydrogenated amorphous silicon

Younghwan Yang, Jaehyuck Jang, Chunghwan Jung, Trevon Badloe, Junsuk Rho

Proceedings Volume PC12646, PC126461O (2023) https://doi.org/10.1117/12.2673186

KEYWORDS: Amorphous silicon, Titanium dioxide, Refractive index, Gallium nitride, Visible radiation, Toxicity, Silicon nitride, Semiconductors, Scattering, Reflection

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Proceedings Article | 6 October 2023 Poster

Observing sequential aspects of metasurface with deep neural networks

Jaebum Noh, Younghwan Yang, Junsuk Rho

Proceedings Volume PC12655, PC1265517 (2023) https://doi.org/10.1117/12.2676322

KEYWORDS: Neural networks, Design and modelling, Refractive index, Visible radiation, Reflection, Optical transmission, Optical properties, Network architectures, Nanophotonics, Holograms

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Proceedings Article | 4 October 2023 Presentation

Bandgap engineered low-loss a-Si:H for efficient dielectric metasurfaces at visible frequencies

Younghwan Yang, Gwanho Yoon, Minkyung Kim, Dasol Lee, Junsuk Rho

Proceedings Volume PC12646, PC126460F (2023) https://doi.org/10.1117/12.2672557

KEYWORDS: Dielectrics, Refractive index, Phase measurement, Optical components, Miniaturization, Incident light, Engineering, Chemical vapor deposition, Amorphous silicon

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Proceedings Article | 4 October 2023 Presentation

Humidity-responsive tunable metasurfaces with nanoimprinted structural polyvinyl alcohol

Byoungsu Ko, Trevon Badloe, Younghwan Yang, Junsuk Rho

Proceedings Volume PC12646, PC126460G (2023) https://doi.org/10.1117/12.2676288

KEYWORDS: Polyvinyl alcohol, Optical components, Humidity, Relative humidity, Nanostructures, Visible radiation, Structural design, Polymers, Optical properties, Optical image encryption

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Proceedings Article | 4 October 2023 Presentation

Humidity-responsive full color nano-pixels via nanoporous Fabry-Pérot structure

Jaekyung Kim, Byoungsu Ko, Younghwan Yang, Junsuk Rho

Proceedings Volume PC12646, PC126460B (2023) https://doi.org/10.1117/12.2677174

KEYWORDS: Humidity, Silver, Polyvinyl alcohol, Nanoparticles, Metals, Toxicity, Optical properties, Nanoimprint lithography, Molecules, Magnetism

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SPIE Journal Paper | 7 June 2023 Open Access

Writing nanometer-scale structures for centimeter-scale color printing

Younghwan Yang, Trevon Badloe, Junsuk Rho

AP, Vol. 5, Issue 03, 030501, (June 2023) https://doi.org/10.1117/12.10.1117/1.AP.5.3.030501

KEYWORDS: Fabrication, Multiphoton lithography, Color printing, Spatial resolution, RGB color model, Pixel resolution, Photoresist materials, Optical filters, Nanoimprint lithography, Lithography

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SPIE Journal Paper | 22 May 2023 Open Access

Emerging low-cost, large-scale photonic platforms with soft lithography and self-assembly

Hyunjung Kang, Dohyeon Lee, Younghwan Yang, Dong Kyo Oh, Junhwa Seong, Jaekyung Kim, Nara Jeon, Dohyun Kang, Junsuk Rho

PI, Vol. 2, Issue 02, R04, (May 2023) https://doi.org/10.1117/12.10.3788/PI.2023.R04

KEYWORDS: Block copolymers, Particles, Nanoimprint lithography, Printing, Lithography, Fabrication, Polymers, Gold, Optical lithography, Copyright

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Proceedings Article | 17 March 2023 Presentation

Deep learning-based glucose sensing robust to sample position error with split ring resonator sensor

Seokho Lee, Trevon Badloe, Younghwan Yang, Junsuk Rho

Proceedings Volume PC12432, PC124320M (2023) https://doi.org/10.1117/12.2648302

KEYWORDS: Refractive index, Data processing, Water, Visualization, Optical properties, Scattering, Optical signal processing, Nanostructures, Information visualization, Holograms

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Proceedings Article | 4 October 2022 Presentation

Suppressing optical losses of hydrogenated amorphous silicon for dielectric metasurfaces working at the visible frequencies, and revealing its structural disorder. (Conference Presentation)

Gwanho Yoon, Junsuk Rho, Sunghak Park, Ki Tae Nam, Younghwan Yang

Proceedings Volume PC12202, PC1220206 (2022) https://doi.org/10.1117/12.2632722

KEYWORDS: Dielectrics, Visible radiation, Amorphous silicon, Refractive index, Plasma enhanced chemical vapor deposition, Titanium dioxide, Silicon, Gallium nitride, Semiconductors, Plasma

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Proceedings Article | 3 October 2022 Presentation

One-step nanoimprinting of PVA for dynamic dual-mode security metasurfaces

Trevon Badloe, Byoungsu Ko, Younghwan Yang, Junsuk Rho

Proceedings Volume PC12196, PC121961A (2022) https://doi.org/10.1117/12.2632909

KEYWORDS: Information security, Humidity, Holography, Wavefronts, Visible radiation, Refractive index, Receivers, Printing, Packaging, Optical properties

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Proceedings Article | 3 October 2022 Presentation

Tunable one-step nanoimprinted RGB-achromatic bifocal metalens (Conference Presentation)

Trevon Badloe, Sunae So, Joohoon Kim, Younghwan Yang, Jaekyung Kim, Yeseul Kim, Junsuk Rho

Proceedings Volume PC12195, PC121951M (2022) https://doi.org/10.1117/12.2632895

KEYWORDS: Wave propagation, Virtual reality, Titanium dioxide, Optical components, Nanoparticles, Optical properties, Liquid crystals, Lenses, LCDs

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Proceedings Article | 3 October 2022 Presentation

Electrically tunable intensity of metaholography using liquid-crystal assisted chiral metasurfaces at the visible

Younghwan Yang, Hongyoon Kim, Junsuk Rho

Proceedings Volume PC12195, PC121950K (2022) https://doi.org/10.1117/12.2632939

KEYWORDS: Liquid crystals, Split ring resonators, Polarization, Plasmonics, Dichroic materials, Switches, Silicon, Integrated optics, Germanium, Amorphous silicon

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SPIE Journal Paper | 7 March 2022 Open Access

Tunable metasurfaces towards versatile metalenses and metaholograms: a review

Jaekyung Kim, Junhwa Seong, Younghwan Yang, Seong-Won Moon, Trevon Badloe, Junsuk Rho

AP, Vol. 4, Issue 02, 024001, (March 2022) https://doi.org/10.1117/12.10.1117/1.AP.4.2.024001

KEYWORDS: Holograms, Holography, Polarization, Modulation, Liquid crystals, Dielectric polarization, Light sources, Graphene, 3D image reconstruction, Photonics

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Proceedings Article | 5 March 2021 Poster

On-demand design of spectrally selective multi-band absorbers using deep learning

Sunae So, Younghwan Yang, Taejun Lee, Junsuk Rho

Proceedings Volume 11703, 117031Q (2021) https://doi.org/10.1117/12.2582953

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Proceedings Article | 5 March 2021 Poster

Selective multilayer emitter for high performance daytime radiative cooling

Sunae So, Younghwan Yang, Junsuk Rho

Proceedings Volume 11681, 1168113 (2021) https://doi.org/10.1117/12.2583040

KEYWORDS: Transparency, Structural design, Solar radiation, Solar energy, Silica, Magnesium fluoride, Genetic algorithms, Atmospheric modeling, Absorption

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