Adaptive tip-enhanced nano-spectroscopy
SCIE
SCOPUS
- Title
- Adaptive tip-enhanced nano-spectroscopy
- Authors
- Lee, Dong Yun; Park, Chulho; Choi, Jinseong; Koo, Yeonjeong; Kang, Mingu; Jeong, Mun Seok; Raschke, Markus B.; Park, Kyoung-Duck
- Date Issued
- 2021-06
- Publisher
- Springer Science and Business Media LLC
- Abstract
- AbstractTip-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 ~4.4 × 104-fold TEPL enhancement of a WSe2 monolayer which is >2× 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.
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/114692
- DOI
- 10.1038/s41467-021-23818-1
- ISSN
- 2041-1723
- Article Type
- Article
- Citation
- Nature Communications, vol. 12, no. 1, 2021-06
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- There are no files associated with this item.
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