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

Authors

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

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Issue

2018: Proceedings of the 36th Samahang Pisika ng Pilipinas Physics Conference

Article ID

SPP-2018-2B-03

Section

Condensed Matter Physics and Materials Science

Published

2018-05-10

How to Cite

[1]

MV 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://proceedings.spp-online.org/article/view/SPP-2018-2B-03.