Ultrathin silicon nitride metalens in the full range of visible light = 가시광선 전 영역에서 작동하는 초박형 실리콘 질화물 메타렌즈

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As miniaturized imaging devices are used more frequently for biomedical purposes such as diagnoses or surgeries, the demands for smaller, thinner lenses increases. In conventional macroscopic lenses, more aberration occurs as the thickness is reduced. Metalenses overcome this limitation by controlling the phase of light with subwavelength-scale nanostructures. However, conventional metalenses are designed to focus light in a single or narrow wavelength range, and cannot concentrate light on focus that deviates from the target wavelength due to severe aberration. We proposed an ultrathin silicon nitride metalens that operates in the full range of visible light. Silicon nitride metalens was designed to have a total diameter of 60$\mu m$ and a focal length of 250$\mu m$ at 633nm wavelength. The metalens concentrated light at distances of 250$\mu m$ and 320$\mu m$ from the lens for 633nm and 533nm lasers, respectively, and obtained images of the object in the entire wavelengths of light. The proposed silicon nitride metalens will present new approaches for ultrathin imaging devices.
Advisors
Jeong, Ki-Hunresearcher정기훈researcher
Description
한국과학기술원 :바이오및뇌공학과,
Publisher
한국과학기술원
Issue Date
2018
Identifier
325007
Language
eng
Description

학위논문(석사) - 한국과학기술원 : 바이오및뇌공학과, 2018.2,[65 p. :]

Keywords

Metalens▼aSilicon nitride▼aVisible light▼aLight focusing; 메타렌즈▼a실리콘 질화물▼a가시광선▼a초점 집중▼a이미징

URI
http://hdl.handle.net/10203/266182
Link
http://library.kaist.ac.kr/search/detail/view.do?bibCtrlNo=733820&flag=dissertation
Appears in Collection
BiS-Theses_Master(석사논문)
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