Linear frequency conversion of light via time-varying metasurface = 시간에 따라 변화하는 메타표면을 이용한 빛의 선형 주파수 변환

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The frequencies of electromagnetic waves are found to be linearly converted as the waves propagate through a temporally varying medium.In addition, effective temporal control of the medium, be it artificial or natural, through which the waves are propagating, lies at the heart of linear optical frequency conversion. In this study, we demonstrated tailorable linear frequency conversion with rapidly time-variant metasurfaces at THz frequencies. The proposed metasurface is designed for the sudden merging of two distinct meta-atoms into a single one upon ultrafast optical excitation. From this spectrally-engineered temporal boundary onward, the resonance frequency component of the merged meta-atom is radiated. In addition, temporal coherence of the two original resonating modes with respect to the abrupt temporal boundary is found to be strongly related to the amount of frequency conversion as well as the phase of the converted wave.
Advisors
Min, Bumkiresearcher민범기researcher
Description
한국과학기술원 :기계공학과,
Publisher
한국과학기술원
Issue Date
2019
Identifier
325007
Language
eng
Description

학위논문(박사) - 한국과학기술원 : 기계공학과, 2019.2,[iv, 36 p. :]

Keywords

Metamaterial▼afrequency conversion▼aoptics; 메타물질; 주파수 변환; 광학

URI
http://hdl.handle.net/10203/264507
Link
http://library.kaist.ac.kr/search/detail/view.do?bibCtrlNo=841762&flag=dissertation
Appears in Collection
ME-Theses_Ph.D.(박사논문)
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