DC Field | Value | Language |
---|---|---|
dc.contributor.advisor | Lee, Yong-Hee | - |
dc.contributor.advisor | 이용희 | - |
dc.contributor.author | Yoon, Seung Ju | - |
dc.date.accessioned | 2021-05-11T19:44:16Z | - |
dc.date.available | 2021-05-11T19:44:16Z | - |
dc.date.issued | 2020 | - |
dc.identifier.uri | http://library.kaist.ac.kr/search/detail/view.do?bibCtrlNo=908079&flag=dissertation | en_US |
dc.identifier.uri | http://hdl.handle.net/10203/283605 | - |
dc.description | 학위논문(박사) - 한국과학기술원 : 물리학과, 2020.2,[x, 78 p :] | - |
dc.description.abstract | We propose and demonstrate a novel optical nanoscopy platform that can effectively trap the single nano-particle and transform any trapped linear non-fluorescent nano-particle into a self-illuminating nonlinear light source with minimal pump power. By using highly focused photon energy in a volume of $5\times5×\times7 nm^3$ through the three-dimensionally tapered plasmonic nanoantenna, a single 4.4-nm CdSe/ZnS quantum dot (QD) is trapped. Simultaneously, the strongly focused light into a metallic nanogap generates a strong nonlinear signal and the trapped QD is monitored by self-illuminating background-free 780-nm second-harmonic signals under a fs-laser pulse pumping. The optical trapping characteristics of a trapped nanoparticle is experimentally demonstrated by controlling the landscape of optical potential wells. In particular, the Kramers transition of QD is observed which is the motion in the double-well potential formed on the two metal surfaces when the nanoparticle is trapped at the nanoantenna. By controlling the shape of the double-well potential formed in the antenna, the Kramers transition rate is modulated. This material-free, label-free, background-free detection capability and smallness of the trapping potential of our proposed scheme could open a new platform for novel bio-optical nanoscopy. | - |
dc.language | eng | - |
dc.publisher | 한국과학기술원 | - |
dc.subject | plasmonic▼aoptical trapping▼aoptical tweezer▼acavity▼aantenna▼anonlinear generation▼anon-fluorescent nanoscopy▼ananoantenna▼ananocavity▼aKramers transition | - |
dc.subject | 플라즈모닉▼a광 포집▼a광 집게▼a공동▼a안테나▼a비선형▼a비선형 나노스코피▼a나노안테나▼a나노케비티▼a크레이머스 전이 | - |
dc.title | Non-fluorescent nanoscopic monitoring of a single nanoparticle trapped between two nonlinear point sources | - |
dc.title.alternative | 두 개의 비선형 점광원 사이에 광 포집 되어있는 단일 나노 입자의 비 형광 나노 스케일 모니터링 | - |
dc.type | Thesis(Ph.D) | - |
dc.identifier.CNRN | 325007 | - |
dc.description.department | 한국과학기술원 :물리학과, | - |
dc.contributor.alternativeauthor | 윤승주 | - |
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.