Near-field thermal radiation between hyperbolic metamaterials and its application to hyperbolic near-field thermophotovoltaic system하이퍼볼릭 메타물질 사이의 근접장 복사 열전달과 하이퍼볼릭 근접장 열광전지 연구

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This study aims to measure near-field thermal radiation between hyperbolic metamaterials and design hyperbolic near-field thermophotovoltaic system with high performance. We first measure near-field thermal radiation between doped silicon plates separated by submicron gap using MEMS-based platform. Precise control over vacuum gap and measurement of heat transfer rate are now possible by improving the MEMS-based platform. With this MEMS-device-integrated platform, for the first time, enhanced near-field thermal radiation between hyperbolic metamaterials is experimentally validated. Further, it is shown that near-field thermal radiation can be manipulated by varying the filling ratio of nanostructures, or tuning the coupling of the surface polaritons within the structures. Based on the experimental results, to enhance the performance of low-temperature near-field thermophotovoltaic system operating at large vacuum gap distance, a monolayer of graphene and multilayered graphene are introduced on the thermophotovoltaic cell. By conducting performance analysis of graphene-assisted near-field thermophotovoltaic system, the pivotal criteria for enhancing performance are revealed, and finally, hyperbolic near-field thermophotovoltaic system is designed. Hyperbolic near-field thermophotovoltaic system with hyperbolic-metamaterial emitter and multilayered graphene is optimized to maximize the power output using genetic algorithm. It is found that coupling of surface plasmon polaritons inside the hyperbolic metamaterial and multilayered graphene increases the near-field thermal radiation and the performance of the near-field thermophotovotaic system at large vacuum gap distance.
Advisors
Lee, Seung S.researcher이승섭researcherLee, Bong Jaeresearcher
Description
한국과학기술원 :기계공학과,
Publisher
한국과학기술원
Issue Date
2018
Identifier
325007
Language
eng
Description

학위논문(박사) - 한국과학기술원 : 기계공학과, 2018.2,[vii, 126 p. :]

Keywords

near-field thermal radiation▼anear-field thermophotovoltaic system▼asurface plasmon polariton▼ahyperbolic metamaterial▼agraphene▼amultilayered nanostructure; 근접장 복사 열전달▼a근접장 열광전지▼a표면 플라즈몬 폴라리톤▼a하이퍼볼릭 메타물질▼a그래핀▼a나노 적층 구조

URI
http://hdl.handle.net/10203/264549
Link
http://library.kaist.ac.kr/search/detail/view.do?bibCtrlNo=867876&flag=dissertation
Appears in Collection
ME-Theses_Ph.D.(박사논문)
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