S
Seunghoon Lee
Researcher at KAIST
Publications - 119
Citations - 4974
Seunghoon Lee is an academic researcher from KAIST. The author has contributed to research in topics: Metamaterial & Terahertz radiation. The author has an hindex of 28, co-authored 108 publications receiving 4262 citations. Previous affiliations of Seunghoon Lee include California Institute of Technology & Dong-a University.
Papers
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Journal ArticleDOI
Switching terahertz waves with gate-controlled active graphene metamaterials
Seunghoon Lee,Muhan Choi,Muhan Choi,Teun-Teun Kim,Teun-Teun Kim,Seungwoo Lee,Ming Liu,Xiaobo Yin,Hongkyw Choi,Seung S. Lee,Choon-Gi Choi,Sung-Yool Choi,Xiang Zhang,Xiang Zhang,Bumki Min +14 more
TL;DR: It is demonstrated that substantial gate-induced persistent switching and linear modulation of terahertz waves can be achieved in a two-dimensional metamaterial, into which an atomically thin, gated two- dimensional graphene layer is integrated.
Journal ArticleDOI
An optical-frequency synthesizer using integrated photonics
Daryl T. Spencer,Tara E. Drake,Travis C. Briles,Travis C. Briles,Jordan R. Stone,Jordan R. Stone,Laura C. Sinclair,Connor Fredrick,Connor Fredrick,Qing Li,Daron A. Westly,B. Robert Ilic,Aaron Bluestone,Nicolas Volet,Tin Komljenovic,Lin Chang,Seunghoon Lee,Dong Yoon Oh,Myoung-Gyun Suh,Ki Youl Yang,Martin H. P. Pfeiffer,Tobias J. Kippenberg,Erik J. Norberg,Luke Theogarajan,Kerry J. Vahala,Nathan R. Newbury,Kartik Srinivasan,John E. Bowers,Scott A. Diddams,Scott A. Diddams,Scott B. Papp,Scott B. Papp +31 more
TL;DR: Any application of an optical-frequency source could benefit from the high-precision optical synthesis presented here, and leveraging high-volume semiconductor processing built around advanced materials could allow such low-cost, low-power and compact integrated-photonics devices to be widely used.
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
Switching teraherz waves with gate-controlled active graphene metamaterials
Seunghoon Lee,Muhan Choi,Teun-Teun Kim,Seungwoo Lee,Ming Liu,Xiaobo Yin,Hongkyw Choi,Seung S. Lee,Choon-Gi Choi,Sung-Yool Choi,Xiang Zhang,Bumki Min +11 more
TL;DR: In this paper, the gate-induced persistent switching and linear modulation of terahertz waves can be achieved in a two-dimensional artificial material, referred to as a metamaterial, into which an atomically thin, gated twodimensional graphene layer is integrated.
Journal ArticleDOI
Ultrathin Free-Standing Ternary-Alloy Nanosheets.
Jong Wook Hong,Yena Kim,Dae Han Wi,Seunghoon Lee,Su-Un Lee,Young Wook Lee,Sang-Il Choi,Sang Woo Han +7 more
TL;DR: The prepared Pd-Pt-Ag nanosheets were superior catalysts of ethanol electrooxidation owing to their specific structural and compositional characteristics and will pave the way for the design of multicomponent 2D nanomaterials with unprecedented functions.