Dr. Kyoungho Ha Profile

Dr. Kyoungho Ha

at SAMSUNG Electronics Co Ltd

SPIE Involvement:

Author

Publications (13)

Proceedings Article | 15 June 2023 Presentation

All dielectric reconfigurable metasurface with high efficiency and directivity

Junghyun Park, Byung Gil Jung, Sun Il Kim, Minkyung Lee, Kanghee Won, Young Kim, Kyoungho Ha, Hyuck Choo

Proceedings Volume PC12514, PC1251402 (2023) https://doi.org/10.1117/12.2663044

KEYWORDS: Dielectrics, Mirrors, Microelectromechanical systems, LIDAR, Beam steering, Silica, Resonators, Refractive index, Reflectivity, Optical properties

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Proceedings Article | 17 March 2023 Presentation

Electrically tunable metasurface for highly-efficient beam steering

Junghyun Park, Byung Gil Jeong, Sun Il Kim, Minkyung Lee, Kyoungho Ha, Hyuck Choo

Proceedings Volume PC12432, PC124320S (2023) https://doi.org/10.1117/12.2652213

KEYWORDS: Beam steering, Wavefronts, Silicon, Transparent conducting oxide, Silica, Resonators, Resistors, Reflectivity, Polarization, Optical design

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Proceedings Article | 5 March 2022 Presentation + Paper

Commoditizing the uncommoditized: chip-scale LiDAR

Inoh Hwang, Eunkyung Lee, Changgyun Shin, Jisan Lee, Hyunil Byun, Dongshik Shim, Changbum Lee, Bongyong Jang, Kyunghyun Son, Tatsuhiro Otsuka, Hyuck Choo, Kyoungho Ha, Dongjae Shin

Proceedings Volume 12007, 1200708 (2022) https://doi.org/10.1117/12.2610860

KEYWORDS: LIDAR, Silicon, Silicon photonics, Photonic integrated circuits, Sensors

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Proceedings Article | 5 March 2021 Presentation

Fully reconfigurable 2D active metasurface array

Junghyun Park, Byung Gil Jeong, Sun Il Kim, Duhyun Lee, Kyoungho Ha, Hyuck Choo

Proceedings Volume 11695, 116950O (2021) https://doi.org/10.1117/12.2582346

KEYWORDS: Beam steering, Gold, Tin, Polarization, Plasmonics, Oxides, Optical sensing, Optical communications, Mirrors, Indium

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Proceedings Article | 22 August 2020 Presentation

Electrically tunable metasurface for lidar

Byung Gil Jeong, Sun Il Kim, Duhyun Lee, Jisan Lee, Inoh Hwang, Hyuck Choo, Kyoungho Ha, Junghyun Park

Proceedings Volume 11462, 114620R (2020) https://doi.org/10.1117/12.2567084

KEYWORDS: LIDAR, Antennas, Control systems, Dielectric polarization, Modulation, Dielectrics, Optical antennas, Wavefronts, Cameras, Holography

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Proceedings Article | 8 March 2014 Paper

Fabrication and characterization of the Si-photonics-integrated vertical resonant-cavity light-emitting diode

Duanhua Kong, Taek Kim, Sihan Kim, Hyungi Hong, Igor Shcherbatko, Youngsoo Park, Kyoung-Ho Ha, Gitae Jeong, Dongjae Shin

Proceedings Volume 8991, 899109 (2014) https://doi.org/10.1117/12.2038642

KEYWORDS: Silicon, Light emitting diodes, Wafer bonding, Etching, Wafer-level optics, Optical interconnects, Light sources, Reactive ion etching, Vertical cavity surface emitting lasers, Plasma

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Proceedings Article | 23 February 2012 Paper

Si-based optical I/O for optical memory interface

Hanmei Choi, Sujin Park, Hyukjoon Kwon, Jinyong Choi, Sujin Yang, Sangdeok Han, Hong-gu Yoon, Bongjin Kuh, Dongjae Shin, Cheongryong Cho, Seokhun Hyun, Jeongsik Nam, Insung Joe, Hyunil Byun, Kiho Kim, Jeong-kyoum Kim, Joosun Choi, Hyeunsu Kim, Yong-hwack Shin, Kyoungwon Na, Seokyong Hong, Hochul Ji, Sungho Park, Sungjin Jang, Minchang Cho, Yoondong Park, Hocheol Lee, Junghye Kim, Junghwan Choi, Minwoo Lee, Beomseok Lee, Sungdong Suh, Junghyung Pyo, Kichul Kim, Kwanghyun Lee, Kyoungho Ha, Saebyeol Kim, Kwansik Cho, Hyunjoo Lee, Chilhee Chung, Jinwoo Choi, Seong-gu Kim, Taejin Jeong, Sanghoon Choi

Proceedings Volume 8267, 82670F (2012) https://doi.org/10.1117/12.912794

KEYWORDS: Interfaces, Modulators, Waveguides, Photodiodes, Silicon, Optical components, Oxides, Optical interconnects, Eye, Crystals

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Proceedings Article | 8 February 2007 Paper

Recent achievements of AlInGaN based laser diodes in blue and green wavelength

K. Ha, Y. Sung, H. Ryu, K. Kim, Y. Kim, H. Paek, S. Chae, H. Kim, J. Son, O. H. Nam, Y. Park, S. Lee, T. Jang

Proceedings Volume 6473, 64730X (2007) https://doi.org/10.1117/12.702998

KEYWORDS: Quantum wells, Gallium nitride, Continuous wave operation, Indium gallium nitride, Semiconductor lasers, Annealing, Diodes, Quantum efficiency, Transmission electron microscopy, Projection systems

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Proceedings Article | 6 October 2006 Paper

Recent progress of high-power InGaN blue-violet laser diodes

O. Nam, S. Lee, K. Kim, H. Ryu, T. Jang, T. Sakong, Y. Park, J. Chae, Y. Sung, J. Son, K. Ha, H. Paek, K. Choi, H. Kim

Proceedings Volume 6352, 63521I (2006) https://doi.org/10.1117/12.691128

KEYWORDS: Quantum wells, Indium gallium nitride, Aluminum, Temperature metrology, Gallium nitride, Semiconductor lasers, Superlattices, Near field optics, Continuous wave operation

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Proceedings Article | 6 October 2006 Paper

Waveguide structural effect on ripples of far-field pattern in 405-nm GaN-based laser diodes

Okhyun Nam, Kyung-ho Ha, Jongin Shim, Sungmin Hwang, Hanyoul Ryu, Junghye Chae

Proceedings Volume 6352, 63521J (2006) https://doi.org/10.1117/12.691215

KEYWORDS: Waveguides, Semiconductor lasers, Gallium, Refractive index, Gallium nitride, Aluminum, Near field optics, Cladding, Active optics, Waveguide modes

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Proceedings Article | 3 March 2006 Paper

Increase of output power and lifetime by improving the heat dissipation of GaN-based laser diodes

Sakong Tan, Kwang-Ki Choi, Youn-Joon Sung, Han-Youl Ryu, Hyungkun Kim, Sung-Nam Lee, Taehoon Jang, Yong-Jo Park, Jung-Hye Chae, Ok-Hyun Nam, Ho-Sun Baek, Kyu-Sang Kim, Kyoung-Ho Ha, Younhee Kim, Joong-Kon Son, Suhee Chae

Proceedings Volume 6121, 61210Y (2006) https://doi.org/10.1117/12.647332

KEYWORDS: Semiconductor lasers, Sapphire, Temperature metrology, Light sources, Indium gallium nitride, Waveguide lasers, Waveguides, Metalorganic chemical vapor deposition, Gallium nitride, Aluminum nitride

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Proceedings Article | 22 February 2006 Paper

High power AlInGaN-based blue-violet laser diodes

Y. J. Park, S. H. Chae, J. H. Chae, K. K. Choi, O. H. Nam, T. Sakong, K. H. Ha, Y. J. Sung, T. H. Chang, H. S. Paek, S. N. Lee, H. S. Kim, H. Y. Ryu, J. K. Son, Y. H. Kim, H. G. Kim

Proceedings Volume 6133, 61330N (2006) https://doi.org/10.1117/12.645579

KEYWORDS: Aluminum, Semiconductor lasers, Electron beam lithography, Near field optics, Gallium nitride, Superlattices, Near field, Magnesium, High power lasers, Gallium

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Proceedings Article | 1 April 2005 Paper

Measurement of junction temperature in GaN-based laser diodes using voltage-temperature characteristics

Kyoung-Ho Ha, Jung-Hye Chae, Yong-Jo Park, Ok-Hyun Nam, Han-Youl Ryu

Proceedings Volume 5738, (2005) https://doi.org/10.1117/12.590240

KEYWORDS: Temperature metrology, Gallium nitride, Sapphire, Semiconductor lasers, Continuous wave operation, Indium gallium nitride, Optical testing, Superlattices, Pulsed laser operation

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Showing 5 of 13 publications

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