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Updated: Mar 1, 2026

Resonance Raman Spectroscopy of Extreme Nanowires and Other 1D Systems
Published on: April 28, 2016
Anomalous Nonlinear Optical Response of Graphene Near Phonon Resonances
Lucas Lafetá1, Alisson R Cadore1, Thiago G Mendes-de-Sa1
1Departamento de Física, Universidade Federal de Minas Gerais , Belo Horizonte, Minas Gerais 31270-901, Brazil.
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.
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