Stimulated Raman Scattering in Two-Dimensional Materials
ORAL
Abstract
In this work we will show some of our progress for imaging two dimensional materials Stimulated Raman Scattering (SRS) and with coherent anti-stokes spectrocopy (CARS). The number of different two dimensional materials increases every day, with different interesting physical properties and possible applications. Therefore a fast and non-destructive imaging and spectroscopies technics to find and characterize these materials is highly desirable. We have studied the Coherent Anti-Stokes Raman Spectrum in graphene and h-BN. For the case of h-BN was observed an increase in the intensity of anti-Stokes signal when the energy difference between the pump laser and Stokes is equal to the phonon energy of the h-BN (1365 cm-1) . However, in samples of graphene the signal was decreased when the energy difference between the lasers is equal with the phonon energy in graphene (1590 cm-1). We will address the causes for the observation of this phenomenon based on different electronic structures of these two materials, leading to a Fano lineshape in the spectrum. Finally, we will also discuss the application of SRS imaging in fewlayers of h-BN in order to identify these layers by a fast imaging technique.
*We acknowledg financial support from INCT Medicina Molecular, FAPEMIG, CNPq and CAPES.
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Presenters
Leandro M. Malard
Physics, Univ Fed de Minas Gerais
Authors
Leandro M. Malard
Physics, Univ Fed de Minas Gerais
Lucas Lafeta
Physics, Univ Fed de Minas Gerais
Alisson Cadore
Physics Department, Institute of Exact Sciences - UFMG
Physics, Univ Fed de Minas Gerais
Tiago Grasiano
Physics, Univ Fed de Minas Gerais
Kenji Watanabe
National Institute for Materials Science
NIMS
National Institute for Material Science
Advanced Materials Laboratory, National Institute for Materials Science
National Institute of Materials Science
Research Center for Functional Materials, National Institute for Materials Science
National Institute for Materials Science (NIMS
Advanced Materials Laboratory, NIMS
National Institute for Materials Science, Advanced Materials Laboratory
National Institue for Materials Science
National Institute of Material Science
National Institute for Matericals Science
Advanced Materials Laboratory
National Institute for Materials Science, 1-1 Namiki
Advanced materials laboratory, National institute for Materials Science
NIMS-Japan
Takashi Taniguchi
National Institute for Materials Science
NIMS
National Institute for Material Science
Advanced Materials Laboratory, National Institute for Materials Science
National Institute of Materials Science
Research Center for Functional Materials, National Institute for Materials Science
National Institute for Materials Science (NIMS
Advanced Materials Laboratory, NIMS
National Institute for Materials Science, Advanced Materials Laboratory
National Institue for Materials Science
National Institute of Material Science
National Institute for Matericals Science
Advanced Materials Laboratory
National Institute for Materials Science, 1-1 Namiki
NIMS-Japan
Leonardo Campos
Physics Department, Institute of Exact Sciences - UFMG
