Anomalous non-linear optical response of graphene near phonon resonances

Use este identificador para citar ou linkar para este item: http://hdl.handle.net/1843/44018

Tipo:	Artigo de Periódico
Título:	Anomalous non-linear optical response of graphene near phonon resonances
Autor(es):	Lucas Lafetá Prates da Fonseca Alisson Ronieri Cadore Thiago Grasiano Mendes de Sá Kenji Watanabe Takashi Taniguchi Leonardo Cristiano Campos Ado Jorio de Vasconcelos Leandro Malard Moreira
Resumo:	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.
Assunto:	Ótica não-linear Grafeno
Idioma:	eng
País:	Brasil
Editor:	Universidade Federal de Minas Gerais
Sigla da Instituição:	UFMG
Departamento:	ICX - DEPARTAMENTO DE FÍSICA
Tipo de Acesso:	Acesso Restrito
Identificador DOI:	https://doi.org/10.1021/acs.nanolett.7b00329
URI:	http://hdl.handle.net/1843/44018
Data do documento:	25-Mai-2017
metadata.dc.url.externa:	https://pubs.acs.org/doi/10.1021/acs.nanolett.7b00329
metadata.dc.relation.ispartof:	Nano Letters
Aparece nas coleções:	Artigo de Periódico

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