Adaptive tip-enhanced nano-spectroscopyopen access
- Authors
- Lee, Dong Yun; Park, Chulho; Choi, Jinseong; Koo, Yeonjeong; Kang, Mingu; Jeong, Mun Seok; Raschke, Markus B.; Park, Kyoung-Duck
- Issue Date
- Jun-2021
- Publisher
- Nature Research
- Citation
- Nature Communications, v.12, no.1, pp.1 - 7
- Indexed
- SCIE
SCOPUS
- Journal Title
- Nature Communications
- Volume
- 12
- Number
- 1
- Start Page
- 1
- End Page
- 7
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/141797
- DOI
- 10.1038/s41467-021-23818-1
- ISSN
- 2041-1723
- 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 ~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.
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