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Adaptive tip-enhanced nano-spectroscopy

Author

Listed:
  • Dong Yun Lee

    (Ulsan National Institute of Science and Technology (UNIST))

  • Chulho Park

    (Sungkyunkwan University (SKKU))

  • Jinseong Choi

    (Ulsan National Institute of Science and Technology (UNIST))

  • Yeonjeong Koo

    (Ulsan National Institute of Science and Technology (UNIST))

  • Mingu Kang

    (Ulsan National Institute of Science and Technology (UNIST))

  • Mun Seok Jeong

    (Hanyang University
    Hanyang University)

  • Markus B. Raschke

    (University of Colorado
    University of Colorado
    University of Colorado)

  • Kyoung-Duck Park

    (Ulsan National Institute of Science and Technology (UNIST))

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.

Suggested Citation

  • Dong Yun Lee & Chulho Park & Jinseong Choi & Yeonjeong Koo & Mingu Kang & Mun Seok Jeong & Markus B. Raschke & Kyoung-Duck Park, 2021. "Adaptive tip-enhanced nano-spectroscopy," Nature Communications, Nature, vol. 12(1), pages 1-7, December.
    • Handle: RePEc:nat:natcom:v:12:y:2021:i:1:d:10.1038_s41467-021-23818-1
    DOI: 10.1038/s41467-021-23818-1
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    Cited by:

    1. Hyeongwoo Lee & Yeonjeong Koo & Shailabh Kumar & Yunjo Jeong & Dong Gwon Heo & Soo Ho Choi & Huitae Joo & Mingu Kang & Radwanul Hasan Siddique & Ki Kang Kim & Hong Seok Lee & Sangmin An & Hyuck Choo &, 2023. "All-optical control of high-purity trions in nanoscale waveguide," Nature Communications, Nature, vol. 14(1), pages 1-8, December.

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