Dr. Yongjo Park Profile

Dr. Yongjo Park

at SAMSUNG Electro-Mechanics

SPIE Involvement:

Author

Proceedings Article | 12 February 2010 Paper

Phosphor concentration and geometry for high power white light emitting diode

Kyung-Mi Moon, Se-Hwan An, Hyung-Kun Kim, Jung-Hye Chae, Yong-Jo Park

Proceedings Volume 7617, 76171Y (2010) https://doi.org/10.1117/12.851535

KEYWORDS: Light emitting diodes, Silicon, Particles, Luminous efficiency, Absorption, LED lighting, Reflectors, Reflectivity, Packaging, Refractive index

Read Abstract +

Proceedings Article | 6 October 2006 Paper

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

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

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

Read Abstract +

Proceedings Article | 3 March 2006 Paper

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

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

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

Read Abstract +

Proceedings Article | 22 February 2006 Paper

GaN light-emitting triodes for high-efficiency hole injection and light emission

Jong Kyu Kim, J.-Q. Xi, Hong Luo, Jaehee Cho, Cheolsoo Sone, Yongjo Park, Thomas Gessmann, J. Zavada, H. Jiang, E. Fred Schubert

Proceedings Volume 6134, 61340K (2006) https://doi.org/10.1117/12.647453

KEYWORDS: Light emitting diodes, Ultraviolet radiation, Electron beam lithography, Aluminum, Gallium, Laser sintering, Gallium nitride, Ultraviolet light emitting diodes, Superlattices, Energy efficiency

Read Abstract +

Proceedings Article | 22 February 2006 Paper

High power AlInGaN-based blue-violet laser diodes

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

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

Read Abstract +

Proceedings Article | 10 February 2006 Paper

2 W continuous wave operation of optically pumped blue VECSEL with frequency doubling

Taek Kim, Jaeryung Yoo, Kisung Kim, Sangmoon Lee, Seongjin Lim, Gibum Kim, Junyoun Kim, Soohaeng Cho, Junho Lee, Yongjo Park

Proceedings Volume 6132, 61320K (2006) https://doi.org/10.1117/12.642451

KEYWORDS: Quantum wells, Gallium arsenide, Gallium, Aluminum, Indium gallium arsenide, Second-harmonic generation, Optical pumping, Output couplers, Continuous wave operation, Vertical external cavity surface emitting lasers

Read Abstract +

Proceedings Article | 10 February 2006 Paper

End-pumped vertical external cavity surface emitting laser

Taek Kim, Junho Lee, Sangmoon Lee, Jaeryung Yoo, Kisung Kim, Junyoun Kim, Soohaeng Cho, Seongjin Lim, Gibum Kim, Yongjo Park

Proceedings Volume 6132, 61320D (2006) https://doi.org/10.1117/12.641988

KEYWORDS: Reflectivity, Output couplers, Diamond, Vertical external cavity surface emitting lasers, Optical pumping, Capillaries, Quantum wells, Gallium arsenide, Antireflective coatings, Second-harmonic generation

Read Abstract +

Proceedings Article | 2 September 2005 Paper

Enhancement of light extraction in GaN light-emitting diodes by omni-directional reflectors with ITO nanorod low-refractive-index layer

Jong Kyu Kim, J.-Q. Xi, Hong Luo, Jaehee Cho, Cheolsoo Sone, Yongjo Park, E. Fred Schubert

Proceedings Volume 5941, 59410K (2005) https://doi.org/10.1117/12.621871

KEYWORDS: Light emitting diodes, Silver, Reflectivity, Gallium nitride, Reflectors, Refractive index, Metals, Thin films, Silicon, Nanorods

Read Abstract +

Proceedings Article | 2 September 2005 Paper

Recent development of patterned structure light-emitting diodes

Jaehee Cho, Jeong Wook Lee, Jin Seo Im, Cheolsoo Sone, Yongjo Park, Dongho Kim, Heonsu Jeon, Euijoon Yoon, Dong-Seok Leem, Tae-Yeon Seong

Proceedings Volume 5941, 594102 (2005) https://doi.org/10.1117/12.625922

KEYWORDS: Light emitting diodes, Sapphire, Electrodes, Gallium nitride, Copper indium disulfide, Semiconductors, Interfaces, Optical lithography, Holography, Light scattering

Read Abstract +

Proceedings Article | 2 September 2005 Paper

Improved light extraction efficiency in III-nitride photonic crystal light-emitting diodes

Dong-Ho Kim, Jaehoon Kim, Heonsu Jeon, Yoon Soo Park, Jaehee Cho, Jin Seo Im, Cheolsoo Sone, Yongjo Park

Proceedings Volume 5941, 59410M (2005) https://doi.org/10.1117/12.623511

KEYWORDS: Light emitting diodes, Gallium nitride, Sapphire, Holography, Photonic crystals, Semiconducting wafers, Patterned sapphire substrate, Interfaces, Lithography, Photons

Read Abstract +

Proceedings Article | 1 April 2005 Paper

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

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

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

Read Abstract +

Showing 5 of 11 publications

Conference Committee Involvement (4)

Advanced LED for Solid-State Lighting (Special Symposium)

5 September 2006 | Gwangju, South Korea

Sixth International Conference on Solid State Lighting

14 August 2006 | San Diego, California, United States

Fifth International Conference on Solid State Lighting

1 August 2005 | San Diego, California, United States

Semiconductor and Organic Optoelectronic Materials and Devices

9 November 2004 | Beijing, China

Keywords/Phrases

Search In:

Publication Years