CUED Publications database

Anomalous Nonlinear Optical Response of Graphene Near Phonon Resonances

Lafetá, L and Cadore, AR and Mendes-De-Sa, TG and Watanabe, K and Taniguchi, T and Campos, LC and Jorio, A and Malard, LM (2017) Anomalous Nonlinear Optical Response of Graphene Near Phonon Resonances. Nano Letters, 17. pp. 3447-3451. ISSN 1530-6984

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Abstract

In this work we probe the third-order nonlinear optical property of graphene and hexagonal boron nitride and their heterostructure by the use of coherent anti-Stokes Raman spectroscopy. When the energy difference of the two input fields matches the phonon energy, the anti-Stokes emission intensity is enhanced in h-BN, as usually expected, while for graphene an anomalous decrease is observed. This behavior can be understood in terms of a coupling between the electronic continuum and a discrete phonon state. We have also measured a graphene/h-BN heterostructure and demonstrate that the anomalous effect in graphene dominates the heterostructure nonlinear optical response.

Item Type: Article
Uncontrolled Keywords: Nonlinear optics four-wave mixing graphene hexagonal boron nitride
Subjects: UNSPECIFIED
Divisions: Div B > Solid State Electronics and Nanoscale Science
Depositing User: Cron Job
Date Deposited: 29 Jan 2018 20:06
Last Modified: 15 Apr 2021 04:45
DOI: 10.1021/acs.nanolett.7b00329