Lifetime and polarization for real and virtual correlated stokes-anti-stokes Raman scattering in diamond
The production of correlated Stokes (S) and anti-Stokes (aS) photons (SaS process) mediated by real or virtual phonon exchange has been reported in many transparent materials. In this work, we investigate the polarization and time correlations of SaS photon pairs produced in a diamond sample. We dem...
| Autores: | , , , |
|---|---|
| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2020 |
| País: | Brasil |
| Institución: | Universidade Federal de Minas Gerais (UFMG) |
| Repositorio: | Repositório Institucional da UFMG |
| Idioma: | inglés |
| OAI Identifier: | oai:repositorio.ufmg.br:1843/46751 |
| Acceso en línea: | https://doi.org/10.1103/PhysRevResearch.2.013084 http://hdl.handle.net/1843/46751 https://orcid.org/0000-0001-6916-3770 https://orcid.org/0000-0002-0064-1882 https://orcid.org/0000-0002-5978-2735 |
| Access Level: | acceso abierto |
| Palabra clave: | Raman scattering Phonons Polarization Espalhamento Fônons Polarização |
| Sumario: | The production of correlated Stokes (S) and anti-Stokes (aS) photons (SaS process) mediated by real or virtual phonon exchange has been reported in many transparent materials. In this work, we investigate the polarization and time correlations of SaS photon pairs produced in a diamond sample. We demonstrate that both S and aS photons have mainly the same polarization of the excitation laser. We also perform a pump-and-probe experiment to measure the decay rate of the SaS pair production, evidencing the fundamental difference between the real and virtual (phonon exchange) processes. In real processes, the rate of SaS pair production is governed by the phonon lifetime of (2.8 ± 0.3) ps, while virtual processes only take place within the time width of the pump laser pulses of approximately 0.4 ps. We explain the difference between real and virtual SaS processes by a phenomenological model, based on the probabilities of phonon creation and decay. |
|---|