Dr. Young-Geun Roh Profile

Dr. Young-Geun Roh

at Seoul National Univ

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Author

Publications (9)

Proceedings Article | 24 March 2023 Presentation

Two-dimensional photonic crystal phosphor with TiO2 backbone for efficient and polarization-insensitive absorption of excitation photons

Hansol Lee, Tae-Yun Lee, Yeonsang Park, Kyung-Sang Cho, Young-Geun Roh, Hyuck Choo, Heonsu Jeon

Proceedings Volume PC12431, PC124310B (2023) https://doi.org/10.1117/12.2649597

KEYWORDS: Photons, Absorption, Titanium dioxide, Photonic crystals, Structural engineering, Resonance enhancement, Waveguides, Thin films, Quantum dots, Polarization

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Proceedings Article | 3 October 2022 Presentation

Smartphone-based spectral barcode and its application

Un Jeong Kim, Suyeon Lee, Hyochul Kim, Young-Geun Roh, Hojung Kim, Hyuck Choo, Yeonsang Park

Proceedings Volume PC12197, PC121971E (2022) https://doi.org/10.1117/12.2632900

KEYWORDS: Spectrometers, Sensing systems, Visible radiation, Raman spectroscopy, Near infrared, Medicine, Luminescence, Image sensors, Food inspection, Bandpass filters

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Proceedings Article | 23 February 2017 Presentation + Paper

Optical slot antenna and its application

Yeonsang Park, Jineun Kim, Young-Geun Roh, Q-Han Park

Proceedings Volume 10102, 1010203 (2017) https://doi.org/10.1117/12.2250466

KEYWORDS: Nanorods, Antennas, Plasmonics, Reflectors, Metals, Plasmonic waveguides, Finite-difference time-domain method, Electromagnetic radiation, Polarization, Waveguides, Magnetism, Optical antennas, Integrated optics, Light scattering

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Proceedings Article | 19 September 2016 Paper

Detection-gap-independent optical sensor design using divergence-beam-controlled slit lasers for wearable devices

Young Zoon Yoon, Hyochul Kim, Yeonsang Park, Jineun Kim, Min Kyung Lee, Un Jeong Kim, Young-Geun Roh, Sung Woo Hwang

Proceedings Volume 9974, 997411 (2016) https://doi.org/10.1117/12.2236432

KEYWORDS: Sensors, Optical sensors, Vertical cavity surface emitting lasers, Optical design, Skin, Light emitting diodes, Sensors, Vertical cavity surface emitting lasers, Optical design, Skin, Signal to noise ratio, Arteries, Semiconductor lasers, Signal detection

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Proceedings Article | 18 April 2016 Paper

Radiation direction control by optical slot antenna integrated with plasmonic waveguide

Yeonsang Park, Jineun Kim, Young-Geun Roh, Chang-Won Lee

Proceedings Volume 9884, 988410 (2016) https://doi.org/10.1117/12.2227348

KEYWORDS: Integrated optics, Plasmonic waveguides, Plasmonics, Antennas, Control systems, Electromagnetic radiation, Free space optics, Free space, Finite-difference time-domain method, Integrated optics, Antennas, Plasmonic waveguides, Plasmons, Waveguides, Metals, Silver, Magnetism

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SPIE Journal Paper | 25 September 2013

Patterning of colloidal quantum dots for the generation of surface plasmon

Yeonsang Park, Young-Geun Roh, Un Jeong Kim, Dae-Young Chung, Hwansoo Suh, Jineun Kim, Sangmo Cheon, Jaesoong Lee, Tae-Ho Kim, Kyung-Sang Cho, Chang-Won Lee

JM3, Vol. 12, Issue 04, 041202, (September 2013) https://doi.org/10.1117/12.10.1117/1.JMM.12.4.041202

KEYWORDS: Electron beam lithography, Surface plasmons, Quantum dots, Luminescence, Plasmonics, Optical lithography, Printing, Molecules, Scanning electron microscopy, Atomic force microscopy

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Proceedings Article | 5 March 2013 Paper

Nanoscale patterning of colloidal quantum dots for surface plasmon generation

Yeonsang Park, Young-Geun Roh, Un Jeong Kim, Dae-Young Chung, Hwansoo Suh, Jineun Kim, Sangmo Cheon, Jaesoong Lee, Tae-Ho Kim, Kyung-Sang Cho, Chang-Won Lee

Proceedings Volume 8613, 861305 (2013) https://doi.org/10.1117/12.2003055

KEYWORDS: Quantum dots, Surface plasmons, Optical lithography, Electron beam lithography, Printing, Photonics, Plasmonics, Scanning electron microscopy, Nanocrystals, Molecules

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Proceedings Article | 9 July 2004 Paper

Two-dimensional photonic crystal waveguides with multiple sharp bends

Young-Geun Roh, Sungjoon Yoon, Heonsu Jeon, Seung-Ho Han, Q-Han Park

Proceedings Volume 5360, (2004) https://doi.org/10.1117/12.529782

KEYWORDS: Waveguides, Photonic crystals, Metals, Geometrical optics, Aluminum, Alternate lighting of surfaces, Optical properties, Microwave radiation, Light wave propagation, Fabry–Perot interferometers

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Proceedings Article | 9 July 2003 Paper

GaAs/AIAs-oxide omnidirectional reflector

Yeonsang Park, Young-Geun Roh, Heonsu Jeon

Proceedings Volume 5000, (2003) https://doi.org/10.1117/12.479485

KEYWORDS: Reflectors, Reflectivity, Gallium arsenide, Photonic crystals, Compound semiconductors, Polarization, Reflection, Near infrared, Dielectrics, Oxidation

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Showing 5 of 9 publications

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