Study on the fabrication of plasmonic nanopot structure by directional photofluidization lithography = 방향성 광유체화 리소그래피를 이용한 플라즈모닉 나노항아리 구조체 제작에 관한 연구

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Plasmonic nanostructures have high technological importance due to its numerical applications in spectroscopic sensing and nanofocusing. These various applications stem from its abilities to localize the electromagnetic field into nanoscale hot spots that exceeds the diffraction limit. Therefore, there have been a lot of attempts to fabricate plasmonic nanostructures which are comprised of both sharp tips and small gaps, as they provide much higher electromagnetic field enhancement. However, no existing nanostructures satisfy stringent requirements for the efficient electromagnetic field enhancement including vertically oriented sharp tips, uniformity over a large area, and optical tunability, which are essential for efficient plasmonic light enhancement and practical applications. Herein, we fabricated plasmonic nanopot arrays, which satisfy all the stringent requirements, by directional photofluidization lithography. Vertically aligned tips within plasmonic nanopot structures, which expanded to circular ring, enable effective light coupling and hence to high local field enhancement. Furthermore, regularly patterned large area tips of nanopot array result in uniform optical signal. Finally, the structural features of nanogaps could be precisely con-trolled in a scalable and deterministic manner, so that we can control the resonance frequency over visible range. The suggested nanopot arrays can effectively localize the electromagnetic field; therefore this structure will be of practical importance in spectroscopic and sensing application.
Advisors
Park, Jung-Kiresearcher박정기
Description
한국과학기술원 : 생명화학공학과,
Publisher
한국과학기술원
Issue Date
2013
Identifier
567271/325007  / 020113432
Language
eng
Description

학위논문(석사) - 한국과학기술원 : 생명화학공학과, 2013.2, [ v, 47 p. ]

Keywords

azopolymer; 전자기장 증폭; 나노항아리; 플라즈모닉 나노팁; 방향성 광유체화 리소그래피; 아조고분자; directional photofluidization lithography; plasmonic nanotips; nanopot; electromagnetic field enhancement

URI
http://hdl.handle.net/10203/196253
Link
http://library.kaist.ac.kr/search/detail/view.do?bibCtrlNo=567271&flag=dissertation
Appears in Collection
CBE-Theses_Master(석사논문)
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