Browse

Strong coupling of dielectrics with terahertz gap plasmons within metallic nano-slots
금속 나노구조 안에서 일어나는 테라헤르츠 갭 플라즈몬과 유전체의 상호작용 연구

Cited 0 time in Web of Science Cited 0 time in Scopus
Authors
정지윤
Advisor
김대식
Major
자연과학대학 물리·천문학부
Issue Date
2018-02
Publisher
서울대학교 대학원
Keywords
Terahertz nano-gapsGap plasmonsMetamaterial absorber
Description
학위논문 (박사)-- 서울대학교 대학원 : 자연과학대학 물리·천문학부, 2018. 2. 김대식.
Abstract
In this work a real metal regime of metallic nanostructures in terahertz
frequencies, where most noble metals are treated as perfect electric
conductors, is discussed.With an aid from gap plasmon modes, that is, coupling
of surface plasmons from the two metal sides forming a gap, large
amount of terahertz electric field can enter the metal with electric permittivity
of 106 when the gap is smaller than 100 nm. A method for highthroughput
fabrication of such gaps is first presented, and then peculiar optical
responses – anomalous resonance shifts and a large Ohmic absorption
– are experimentally and theoretically realized. Also, wet etching of a gap
spacer within a 5 nm gap is demonstrated, enabling aqueous nano-optic experiments
below 10 nm scale. This comprehensive study on terahertz gap
plasmon and nanogaps is expected to greatly benefit convergence of chemistry
or bio-chemistry with nano-optics, especially in sub-10 nm regime.
Language
English
URI
https://hdl.handle.net/10371/141102
Files in This Item:
Appears in Collections:
College of Natural Sciences (자연과학대학)Dept. of Physics and Astronomy (물리·천문학부)Physics (물리학전공)Theses (Ph.D. / Sc.D._물리학전공)
  • mendeley

Items in S-Space are protected by copyright, with all rights reserved, unless otherwise indicated.

Browse