Coherent anti-Stokes Raman spectroscopy of single and multi-layer graphene
| Autor: | A. Virga, Carino Ferrante, Domenico De Fazio, Abigail D G Nunn, Giulio Cerullo, Giovanni Batignani, Tullio Scopigno, Andrea C. Ferrari |
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| Přispěvatelé: | Ferrante, C. [0000-0002-6391-0672], Batignani, G. [0000-0002-6214-8604], Ferrari, A. C. [0000-0003-0907-9993], Scopigno, T. [0000-0002-7437-4262], Apollo - University of Cambridge Repository, Ferrante, C [0000-0002-6391-0672], Batignani, G [0000-0002-6214-8604], Ferrari, AC [0000-0003-0907-9993], Scopigno, T [0000-0002-7437-4262] |
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
0301 basic medicine
Materials science Nonlinear optics Science coherent Raman spectroscopy graphene FOS: Physical sciences General Physics and Astronomy Physics::Optics 02 engineering and technology Molecular physics General Biochemistry Genetics and Molecular Biology Spectral line Article law.invention 03 medical and health sciences symbols.namesake law Mesoscale and Nanoscale Physics (cond-mat.mes-hall) cond-mat.mes-hall 639/624/1107/527/1821 Coherent anti-Stokes Raman spectroscopy lcsh:Science Spectroscopy 639/624/400/385 Multidisciplinary Condensed Matter - Mesoscale and Nanoscale Physics Graphene Settore FIS/01 - Fisica Sperimentale General Chemistry 021001 nanoscience & nanotechnology Laser 639/301/357/918/1054 030104 developmental biology Optical properties and devices Raman spectroscopy symbols lcsh:Q physics.optics 140/133 0210 nano-technology Raman scattering Excitation Physics - Optics Optics (physics.optics) |
| Zdroj: | Nature Communications, Vol 10, Iss 1, Pp 1-9 (2019) Nature Communications |
| ISSN: | 2041-1723 |
| Popis: | Spontaneous Raman spectroscopy is a powerful characterization tool for graphene research. Its extension to the coherent regime, despite the large nonlinear third-order susceptibility of graphene, has so far proven challenging. Due to its gapless nature, several interfering electronic and phononic transitions concur to generate its optical response, preventing to retrieve spectral profiles analogous to those of spontaneous Raman. Here we report stimulated Raman spectroscopy of the G-phonon in single and multi-layer graphene, through coherent anti-Stokes Raman Scattering. The nonlinear signal is dominated by a vibrationally non-resonant background, obscuring the Raman lineshape. We demonstrate that the vibrationally resonant coherent anti-Stokes Raman Scattering peak can be measured by reducing the temporal overlap of the laser excitation pulses, suppressing the vibrationally non-resonant background. We model the spectra, taking into account the electronically resonant nature of both. We show how coherent anti-Stokes Raman Scattering can be used for graphene imaging with vibrational sensitivity. Coherent anti-Stokes Raman Scattering (CARS) accesses the vibrational properties of a material via nonlinear four-wave mixing (FWM); CARS in graphene has not been observed to date despite its high nonlinear third-order susceptibility. Here, the authors devised a FWM scheme to perform stimulated Raman spectroscopy in single and multi-layer graphene through CARS. |
| Databáze: | OpenAIRE |
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