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Dive into the research topics where Yong Kon Kwon is active.

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Featured researches published by Yong Kon Kwon.


Applied Physics Letters | 2007

Temperature-dependent brightening and darkening of photoluminescence from PbS quantum dots in glasses

Chao Liu; Yong Kon Kwon; Jong Heo

The authors report that the darkening and brightening of photoluminescence from PbS quantum dots can be controlled by adjusting the temperature and excitation intensity. Intensity of the photoluminescence from PbS quantum dots increased with time (photobrightening) when temperature was below 150K. On the other hand, darkening was observed at temperatures above 150K. It was also possible to make a reversible change between photobrightening and photodarkening from the same specimen through the careful control of the temperature and excitation intensity.


Applied Physics Letters | 2009

Optical modulation of near-infrared photoluminescence from lead sulfide quantum dots in glasses

Chao Liu; Yong Kon Kwon; Jong Heo

The authors report the modulation of photoluminescence intensity from lead sulfide quantum dots using two laser beams with different wavelengths. Photoluminescence from lead sulfide quantum dots in glasses was reversibly switched between the “bright” and “dark” states and degree of darkening to 16% of the initial intensity was realized. Changes in the photoluminescence were insensitive to temperature but strongly dependent on the power densities of the modulating laser beam. This efficient optical modulation has potential for optical switching and memory device applications.


Journal of the American Ceramic Society | 2009

Controlled Precipitation of Lead Sulfide Quantum Dots in Glasses Using the Femtosecond Laser Pulses

Chao Liu; Yong Kon Kwon; Jong Heo; Bok Hyeon Kim; Ik-Bu Sohn


Journal of Non-crystalline Solids | 2009

Absorption and photoluminescence of PbS QDs in glasses

Chao Liu; Yong Kon Kwon; Jong Heo


Journal of the American Ceramic Society | 2010

Lead Sulfide Quantum Dots Formation in Glasses Controlled by Erbium Ions

Sang Min Shim; Chao Liu; Yong Kon Kwon; Jong Heo


Chemical Physics Letters | 2008

Laser-induced blue-shift of the photoluminescence from PbS quantum dots in glasses

Chao Liu; Yong Kon Kwon; Jong Heo


Journal of Non-crystalline Solids | 2008

Local structure and its effect on the oscillator strengths and emission properties of Ho3+ in chalcohalide glasses

Tae Hoon Lee; Yong Kon Kwon; Jong Heo


Journal of Non-crystalline Solids | 2016

Germanosilicate glasses containing PbSe quantum dots for mid-infrared luminescence

Jing Wang; Jihong Zhang; Chao Liu; Jong Heo; Yong Kon Kwon


Journal of The Ceramic Society of Japan | 2008

Near-infrared photoluminescence of PbS QDs precipitated in the glass matrix

Chao Liu; Yong Kon Kwon; Jong Heo


Journal of Non-crystalline Solids | 2014

Lead sulfide quantum dots in glasses containing rare-earth ions

Mi Ae Kim; Yong Kon Kwon; Chao Liu; Jong Heo

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Jong Heo

Pohang University of Science and Technology

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Chao Liu

Wuhan University of Technology

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Bok Hyeon Kim

Gwangju Institute of Science and Technology

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Ik-Bu Sohn

Gwangju Institute of Science and Technology

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Jing Wang

Pohang University of Science and Technology

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Kee Youn Kim

Pohang University of Science and Technology

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Mi Ae Kim

Pohang University of Science and Technology

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Sang Min Shim

Pohang University of Science and Technology

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Sanghwa Jeong

Pohang University of Science and Technology

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Sungjee Kim

Pohang University of Science and Technology

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