Activation of forbidden phonon modes in defect-free graphene on Au(111) substrate by tip-enhanced nano confined light

  • Maria Vanessa Balois Innovative Photon Manipulation Research Team, RIKEN Center for Advanced Photonics
  • Norihiko Hayazawa Surface and Interface Science Laboratory, RIKEN
  • Satoshi Yasuda Japan Atomic Energy Agency
  • Katsuyoshi Ikeda Department of Physical Science and Engineering, Nagoya Institute of Technology
  • Bo Yang Surface and Interface Science Laboratory, RIKEN
  • Emiko Kazuma Surface and Interface Science Laboratory, RIKEN
  • Yasuyuki Yokota Surface and Interface Science Laboratory, RIKEN
  • Yousoo Kim Surface and Interface Science Laboratory, RIKEN
  • Takuo Tanaka Innovative Photon Manipulation Research Team, RIKEN Center for Advanced Photonics

Abstract

High photon confinement and the field gradient effect can alter selection rules in Raman spectroscopy. We report the first observation of the forbidden combination Raman modes in defect-free monolayer graphene on an Au(111) substrate whose Raman peak lies at 2918 cm-1. The occurrence of the forbidden combination Raman modes alongside the D and D' modes is due to the nano confined light generated at the tip apex that, in turn, generates a strong field gradient.

Published
2018-05-10
How to Cite
[1]
M. V. Balois, N. Hayazawa, S. Yasuda, K. Ikeda, B. Yang, E. Kazuma, Y. Yokota, Y. Kim, and T. Tanaka. Activation of forbidden phonon modes in defect-free graphene on Au(111) substrate by tip-enhanced nano confined light, Proceedings of the Samahang Pisika ng Pilipinas 36, SPP-2018-2B-03 (2018). URL: https://paperview.spp-online.org/proceedings/article/view/SPP-2018-2B-03.
Section
Condensed Matter and Materials Science