Adaptive tip-enhanced nano-spectroscopy
Cited 0 times inCited 0 times in
- Adaptive tip-enhanced nano-spectroscopy
- Lee, Dong Yun; Park, Chulho; Choi, Jinseong; Koo, Yeonjeong; Kang, Mingu; Jeong, Mun Seok; Raschke, Markus B.; Park, Kyoung-Duck
- Issue Date
- NATURE RESEARCH
- NATURE COMMUNICATIONS, v.12, no.1, pp.3465
- 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.
- Appears in Collections:
- PHY_Journal Papers
- Files in This Item:
can give you direct access to the published full text of this article. (UNISTARs only)
Show full item record
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.