N
Namkyoo Park
Researcher at Seoul National University
Publications - 373
Citations - 9560
Namkyoo Park is an academic researcher from Seoul National University. The author has contributed to research in topics: Optical amplifier & Metamaterial. The author has an hindex of 48, co-authored 354 publications receiving 8623 citations. Previous affiliations of Namkyoo Park include Stanford University & Sant'Anna School of Advanced Studies.
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Journal ArticleDOI
A terahertz metamaterial with unnaturally high refractive index
Muhan Choi,Seunghoon Lee,Yushin Kim,Seung Beom Kang,Jonghwa Shin,Min Hwan Kwak,Kwang-Young Kang,Yong-Hee Lee,Namkyoo Park,Bumki Min +9 more
TL;DR: It is demonstrated that a broadband, extremely high index of refraction can be realized from large-area, free-standing, flexible terahertz metamaterials composed of strongly coupled unit cells.
Journal ArticleDOI
Terahertz field enhancement by a metallic nano slit operating beyond the skin-depth limit
Minah Seo,Hyeong-Ryeol Park,S. M. Koo,Doo Jae Park,Ji-Hun Kang,O. K. Suwal,S. S. Choi,Paul C. M. Planken,Gun-Sik Park,Namkyoo Park,Q-Han Park,Dai-Sik Kim +11 more
TL;DR: In this article, the effect of a tiny gap in a metal substrate on incident terahertz radiation in the regime where the gap's dimensions are smaller than the metal's skin-depth is investigated.
Journal ArticleDOI
Active terahertz nanoantennas based on VO2 phase transition.
Minah Seo,J. S. Kyoung,Hyeong-Ryeol Park,Sukmo Koo,Hyun-Sun Kim,Hannes Bernien,Bong-Jun Kim,Jong-Ho Choe,Yeong Hwan Ahn,Hyun-Tak Kim,Namkyoo Park,Q-Han Park,Kwang Jun Ahn,Dai-Sik Kim +13 more
TL;DR: This work presents ultra-broad-band metamaterial thin film with colossal dynamic control range, fulfilling present day research demands, and realizes the full potential of the thin film technology for long wavelength applications.
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Atomic layer lithography of wafer-scale nanogap arrays for extreme confinement of electromagnetic waves
Xiaoshu Chen,Hyeong-Ryeol Park,Matthew Pelton,Xianji Piao,Nathan C. Lindquist,Hyungsoon Im,Yun Jung Kim,Jae Sung Ahn,Kwang Jun Ahn,Namkyoo Park,Dai-Sik Kim,Sang Hyun Oh +11 more
TL;DR: A new patterning technology based on atomic layer deposition and simple adhesive-tape-based planarization is introduced, which creates vertically oriented gaps in opaque metal films along the entire contour of a millimetre-sized pattern.
Journal ArticleDOI
Flexible, Angle‐Independent, Structural Color Reflectors Inspired by Morpho Butterfly Wings
Kyungjae Chung,Sunkyu Yu,Chul-Joon Heo,Jae Won Shim,Seung-Man Yang,Moon Gyu Han,Hong-Seok Lee,Yong-wan Jin,Sang Yoon Lee,Namkyoo Park,Jung H. Shin +10 more
TL;DR: A large, flexible reflector is created that actually provides better angle-independent color characteristics than Morpho butterflies and which can even be bent and folded freely without losing its Morpho-mimetic photonic properties.