Search Results - "Chul-Sik Kee"

Bound states in the continuum (BIC) accompanied by avoided crossings in leaky-mode photonic lattices by Lee, Sun-Goo, Kim, Seong-Han, Kee, Chul-Sik

“…When two nonorthogonal resonances are coupled to the same radiation channel, avoided crossing arises and a bound state in the continuum (BIC) appears with…”
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Highly efficient graphene terahertz modulator with tunable electromagnetically induced transparency-like transmission by Kim, Myunghwan, Kim, Seong-Han, Kang, Chul, Kim, Soeun, Kee, Chul-Sik

“…Graphene-based optical modulators have been extensively studied owing to the high mobility and tunable permittivity of graphene. However, weak graphene-light…”
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Subwavelength localization and toroidal dipole moment of spoof surface plasmon polaritons by Kim, Seong-Han, Oh, Sang Soon, Kim, Kap-Joong, Kim, Jae-Eun, Park, Hae Yong, Hess, Ortwin, Kee, Chul-Sik

“…We experimentally and theoretically demonstrate subwavelength scale localization of spoof surface plasmon polaritons at a point defect in a two-dimensional…”
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Polarization-independent electromagnetically induced transparency-like transmission in coupled guided-mode resonance structures by Lee, Sun-Goo, Kim, Seong-Han, Kim, Kap-Joong, Kee, Chul-Sik

“…We present two photonic systems that make it possible to realize polarization-independent electromagnetically induced transparency based on guided-mode…”
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Novel optical properties of six-fold symmetric photonic quasicrystal fibers by Kim, Soan, Kee, Chul-Sik, Lee, Jongmin

“…We have investigated optical properties of an optical fiber having a six-fold symmetric quasiperiodic array of air holes in cladding, a six-fold symmetric…”
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Ultrafast Photo‐Response by Surface State‐Mediated Optical Transitions in Topological Insulator Bi2Te3 Nanowire by Park, Dambi, Jeong, Kwangsik, Maeng, InHee, Kim, Dajung, Kwon, Hoedon, Hong, Seok‐Bo, Kim, Jae‐Hoon, Kee, Chul‐Sik, Kang, Chul, Cho, Mann‐Ho

“…Topological insulators are a new class of materials with highly interesting optoelectronic properties such as strong light absorption, polarization‐dependent…”
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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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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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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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Fourier-component engineering to control light diffraction beyond subwavelength limit by Lee, Sun-Goo, Kim, Seong-Han, Kee, Chul-Sik

“…Resonant physical phenomena in planar photonic lattices, such as bound states in the continuum (BICs) and Fano resonances with 100% diffraction efficiency,…”
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Strong emission of terahertz radiation from nanostructured Ge surfaces by Kang, Chul, Leem, Jung Woo, Maeng, Inhee, Kim, Tae Heon, Lee, Jong Seok, Yu, Jae Su, Kee, Chul-Sik

“…Indirect band gap semiconductors are not efficient emitters of terahertz radiation. Here, we report strong emission of terahertz radiation from germanium…”
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Optical isotropy at terahertz frequencies using anisotropic metamaterials by Lee, In-Sung, Sohn, Ik-Bu, Kang, Chul, Kee, Chul-Sik, Yang, Jin-Kyu, Lee, Joong Wook

“…We demonstrate optically isotropic filters in the terahertz (THz) frequency range using structurally anisotropic metamaterials. The proposed metamaterials with…”
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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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Strong emission of THz radiation from GaAs microstructures on Si by Maeng, Inhee, Lee, Gyuseok, Kang, Chul, Ju, Gun Wu, Park, Kwangwook, Son, Seoung-Bum, Lee, Yong-Tak, Kee, Chul-Sik

“…Remarkably strong emission of terahertz radiation from illuminated GaAs microstructures on a Si substrate is reported. The peak–to–peak amplitude of terahertz…”
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Terahertz band gaps induced by metal grooves inside parallel-plate waveguides by Lee, Eui Su, So, Jin-Kyu, Park, Gun-Sik, Kim, Daisik, Kee, Chul-Sik, Jeon, Tae-In

“…We report experimental and finite-difference time-domain simulation studies on terahertz (THz) characteristics of band gaps by using metal grooves which are…”
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Propagation of spoof surface plasmon on metallic square lattice: bending and splitting of self-collimated beams by Kim, Kap-Joong, Kim, Jae-Eun, Park, Hae Yong, Lee, Yong-Hee, Kim, Seong-Han, Lee, Sun-Goo, Kee, Chul-Sik

“…The propagation characteristics of spoof surface plasmon modes are studied in both real and reciprocal spaces. From the metallic square lattice, we obtain…”
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Electromagnetic shielding via a virtual pillar with a magnetic wall by Kim, Seong-Han, Kee, Chul-Sik

“…It is demonstrated that the objects enclosed by a virtual pillar with a magnetic wall can be completely shielded from EM waves through numerical simulations…”
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Strong Linear Correlation between CH3NH2 Molecular Defect and THz-Wave Absorption in CH3NH3PbI3 Hybrid Perovskite Thin Film by Maeng, Inhee, Matsuyama, Asuka, Yun, Jung-Ho, Wang, Shenghao, Kang, Chul, Kee, Chul-Sik, Nakamura, Masakazu, Jung, Min-Cherl

“…To control the density of a CH3NH2 molecular defect, which strongly contributed to a significant THz-wave absorption property in the CH3NH3PbI3 hybrid…”
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Terahertz resonant transmission through metallic mesh truss structures by Kang, Chul, Kim, Seong Han, Lee, Gyuseok, Maeng, Inhee, Han, Seung Chul, Kang, Kiju, Kee, Chul-Sik

“…In mechanical engineering, truss structures have attracted much attention because of their mechanical strength and light weight. However, electromagnetic…”
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Coupled-cavity-based slow light metamaterials with antireflection structures by Lee, Sun-Goo, Kim, Seong-Han, Jung, Soo-Yong, Lee, Jongjin, Park, Jong-Moon, Kee, Chul-Sik

“…A slow light metamaterial based on a coupled Fabry-Pérot cavity is proposed and numerically studied using finite-difference time-domain simulations. The…”
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