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Park, Kyoung-Duck
Nano-PhotoEnergy Group at UNIST Physics
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Adaptive tip-enhanced nano-spectroscopy

DC Field Value Language Lee, Dong Yun ko Park, Chulho ko Choi, Jinseong ko Koo, Yeonjeong ko Kang, Mingu ko Jeong, Mun Seok ko Raschke, Markus B. ko Park, Kyoung-Duck ko 2021-10-07T07:57:13Z - 2021-07-29 ko 2021-06 ko
dc.identifier.citation NATURE COMMUNICATIONS, v.12, no.1, pp.3465 ko
dc.identifier.issn 2041-1723 ko
dc.identifier.uri -
dc.description.abstract Tip-enhanced nano-spectroscopy, such as tip-enhanced photoluminescence (TEPL) and tip-enhanced Raman spectroscopy (TERS), generally suffers from inconsistent signal enhancement and difficulty in polarization-resolved measurement. To address this problem, we present adaptive tip-enhanced nano-spectroscopy optimizing the nano-optical vector-field at the tip apex. Specifically, we demonstrate dynamic wavefront shaping of the excitation field to effectively couple light to the tip and adaptively control for enhanced sensitivity and polarization-controlled TEPL and TERS. Employing a sequence feedback algorithm, we achieve similar to 4.4x10(4)-fold TEPL enhancement of a WSe2 monolayer which is >2x larger than the normal TEPL intensity without wavefront shaping. In addition, with dynamical near-field polarization control in TERS, we demonstrate the investigation of conformational heterogeneity of brilliant cresyl blue molecules and the controllable observation of IR-active modes due to a large gradient field effect. Adaptive tip-enhanced nano-spectroscopy thus provides for a systematic approach towards computational nanoscopy making optical nano-imaging more robust and widely deployable. Tip-enhanced nano-spectroscopy suffers from inconsistent signal and difficulty in polarization-resolved measurement. Here, the authors present adaptive tip-enhanced nano-spectroscopy, which enables the additional signal enhancement and near-field polarization control via dynamic wavefront shaping. ko
dc.language 영어 ko
dc.publisher NATURE RESEARCH ko
dc.title Adaptive tip-enhanced nano-spectroscopy ko
dc.type ARTICLE ko
dc.identifier.scopusid 2-s2.0-85107822184 ko
dc.identifier.wosid 000664856900023 ko
dc.type.rims ART ko
dc.identifier.doi 10.1038/s41467-021-23818-1 ko
dc.identifier.url ko
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