Search Results - "Hyung Keun Yoo"

Terahertz modulation on angle-dependent photoexcitation in organic-inorganic hybrid structures by Keun Yoo, Hyung, Lee, Sun-Goo, Kang, Chul, Kee, Chul-Sik, Wook Lee, Joong

“…The characteristics of terahertz (THz) modulation in organic copper phthalocyanine thin films deposited on a Si wafer were investigated by angle-dependent…”
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Organic conjugated material-based broadband terahertz wave modulators by Keun Yoo, Hyung, Kang, Chul, Yoon, Youngwoon, Lee, Hanju, Wook Lee, Joong, Lee, Kiejin, Kee, Chul-Sik

“…A simple and efficient broadband terahertz (THz) wave modulator based on an organic conjugated material thin film, 200-nm thick organic copper phthalocyanine…”
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Preparation of bismuth substituted yttrium iron garnet powder and thin film by the metal-organic decomposition method by Lee, Hanju, Yoon, Youngwoon, Kim, Songhui, Yoo, Hyung Keun, Melikyan, Harutyun, Danielyan, Emma, Babajanyan, Arsen, Ishibashi, Takayuki, Friedman, Barry, Lee, Kiejin

“…The crystallization of bismuth substituted yttrium iron garnet (Bi-YIG) powder and thin film prepared by the metal-organic decomposition method (MOD) have been…”
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Improvement of on-cell metrology using spectral imaging with TCAD modeling by Ahn, Byungseong, Lee, Kwangseok, Yang, Jaehun, Doh, Jiseong, Jeong, Jaehoon, Kwag, Taeshin, Kim, Minseok, Kim, Yeonjeong, Kim, Jongchul, Keun Yoo, Hyung, Sin Kim, Dae

“…•On-cell metrology based on spectral imaging is developed to obatin the local characteristics of cell-block.•TCAD modeling is used to generate augmented data,…”
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Highly efficient terahertz wave modulators by photo-excitation of organics/silicon bilayers by Yoo, Hyung Keun, Yoon, Youngwoon, Lee, Kiejin, Kang, Chul, Kee, Chul-Sik, Hwang, In-Wook, Lee, Joong Wook

“…Using hybrid bilayer systems comprising a molecular organic semiconductor and silicon, we achieve optically controllable active terahertz (THz) modulators that…”
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Conditions for optimal efficiency of PCBM-based terahertz modulators by Yoo, Hyung Keun, Lee, Hanju, Lee, Kiejin, Kang, Chul, Kee, Chul-Sik, Hwang, In-Wook, Lee, Joong Wook

“…We demonstrate the conditions for optimal modulation efficiency of active terahertz modulators based on phenyl-C61-butyric acid methyl ester (PCBM)-silicon…”
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Metal-Organic Hybrid Metamaterials for Spectral-Band Selective Active Terahertz Modulators by Yoo, Hyung Keun, Cho, Soo Bin, Park, Sae June, Ahn, Yeong Hwan, Kang, Chul, Hwang, In-Wook, Lee, Joong Wook

“…Optically controlled spectral-band selective terahertz (THz) modulators based on metal-organic hybrid metamaterials were investigated. An artificially…”
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Post-annealing effect on the interface morphology and current efficiency of organic light-emitting diodes by Yoon, Youngwoon, Lee, Hanju, Kim, Taedong, Kim, Kyoungchul, Choi, Sula, Yoo, Hyung Keun, Friedman, Barry, Lee, Kiejin

“…► We studied the post annealing effect on each layer of OLEDs on the surface roughness. ► We observed the crystallinity and roughness changes of each layer in…”
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Characteristics of terahertz wave modulation using wavelength-selective photoexcitation in pentacene/Si and TIPS pentacene/Si bilayers by Yoo, Hyung Keun, Kang, Chul, Kee, Chul-Sik, Hwang, In-Wook, Lee, Joong Wook

“…We demonstrate the characteristics of the optical control of terahertz (THz) wave transmission in photoexcited bilayers of pentacene/Si and…”
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Controlling THz wave transmission through organic copper phthalocyanine (CuPc) films on Si by optical excitation by Hyung Keun Yoo, Chul Kang, Kiejin Lee, Chul-Sik Kee, Joong Wook Lee

“…We show that transmission of THz waves through an organic copper phthalocyanine (CuPc) film on a Si wafer can be controlled by optical excitation. The carriers…”
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Sensitivity enhancement in OCD metrology by optimizing azimuth angle based on the RCWA simulation by Choi, Hyunsuk, Lee, Kwangseok, Doh, Jiseong, Jeong, Jaehoon, Kwag, Taeshin, Kim, Minseok, Kim, Yeonjeong, Kim, Jongchul, Yoo, Hyung Keun, Kim, Dae Sin

“…•Monitoring process using OCD metrology has been performed with a prefixed and unoptimized azimuth angle.•We suggest optimal azimuth angle for FinFET and…”
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Tunable Narrow-band Terahertz Generation at Quasi-phase matched crystals using femtosecond laser pulse by Nan Ei Yu, Chul Kang, Hyung Keun Yoo, Yeung Lak Lee, Do-Kyeong Ko, Kitamura, K., Takekawa, S.

“…Terahertz pulse were generated in periodically poled lithium niobate and lithium tantalate around 1.4 and 0.6 THz with band-width off 20 GHz. The generated…”
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Extremely Efficient Liquid Exfoliation and Dispersion of Layered Materials by Unusual Acoustic Cavitation by Han, Joong Tark, Jang, Jeong In, Kim, Haena, Hwang, Jun Yeon, Yoo, Hyung Keun, Woo, Jong Seok, Choi, Sua, Kim, Ho Young, Jeong, Hee Jin, Jeong, Seung Yol, Baeg, Kang-Jun, Cho, Kilwon, Lee, Geon-Woong

“…Layered materials must be exfoliated and dispersed in solvents for diverse applications. Usually, highly energetic probe sonication may be considered to be an…”
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Improved Carrier Dynamics and High Solar Cell Performance in Postadditive-Soaked PTB7:PC71BM Bulk Heterojunction Materials by Hwang, In-Wook, Kong, Jaemin, Yoo, Hyung Keun, Lee, Kwanghee

“…Improved performance of polymer-based solar cells based on PTB7:PC71BM composites has been obtained by using additive-soaking treatments on pristine…”
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Improved Carrier Dynamics and High Solar Cell Performance in Postadditive-Soaked PTB7:PC 71 BM Bulk Heterojunction Materials by Hwang, In-Wook, Kong, Jaemin, Yoo, Hyung Keun, Lee, Kwanghee

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Terahertz wave modulators in organic/Si bilayers by Hyung Keun Yoo, In-Wook Hwang, Jung-Min Park, Joong Wook Lee

“…We realized optically controllable active terahertz (THz) modulators with extremely high modulation efficiencies, using organic/silicon hybrid structures. The…”
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Transmittance modulation of terahertz pulses through organic-inorganic hybrid structures under polarization and incident angle dependent optical excitation by Hyung Keun Yoo, Sun-Goo Lee, Chul Kang, Joong Wook Lee, Chul-Sik Kee

“…We investigated the transmittance of terahertz (THz) pulses through organic copper phthalocyanine (CuPc) thin films deposited on a Si wafer under optical…”
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Monopole resonators in planar plasmonic metamaterials by Lee, Joong Wook, Yang, Jin-Kyu, Sohn, Ik-Bu, Yoo, Hyung Keun, Kang, Chul, Kee, Chul-Sik

“…We first present a new phenomenon: the quarter-wavelength resonance of an electromagnetic field in planar plasmonic metamaterials consisting of asymmetrically…”
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Terahertz modulation using TIPS-pentacene thin films deposited on patterned silicon substrates by Park, Jung-Min, Sohn, Ik-Bu, Kang, Chul, Kee, Chul-Sik, Hwang, In-Wook, Keun Yoo, Hyung, Wook Lee, Joong

“…We demonstrate the characteristics of terahertz (THz) wave modulation by 6,13-bis(triisopropylsilylethynyl) pentacene (TIPS pentacene) thin films deposited on…”
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Effects of uncertain phase-matching wave vectors of rotating fan-out type poled LiNbO3 on THz generation by Kang, Chul, Lee, Yeung Lak, Jung, Changsoo, Yoo, Hyung Keun, Kee, Chul-Sik

“…We investigated terahertz pulses from a rotating fan-out type poled lithium niobate (LiNbO(3)) pumped by femtosecond laser pulses. In particular, the rotating…”
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