Using phase dynamics in EIT to probe ground state relaxation in rubidium vapor
| Autor: | Hebin Li, Marlan O. Scully, V.A. Sautenkov, George R. Welch, Yuri V. Rostovtsev, Frank A. Narducci, J.P. Davis |
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| Rok vydání: | 2009 |
| Předmět: |
Materials science
Electromagnetically induced transparency business.industry Relaxation (NMR) Phase (waves) Physics::Optics chemistry.chemical_element Optical power Optical field Atomic and Molecular Physics and Optics Rubidium Optics chemistry Atomic physics Ground state business Absorption (electromagnetic radiation) |
| Zdroj: | Journal of Modern Optics. 56:975-979 |
| ISSN: | 1362-3044 0950-0340 |
| Popis: | We have studied a time response of electromagnetically induced transparency (EIT) in a rubidium vapor to a rapid variation of optical phase. We have observed a very fast growth of the absorption when the phase of the optical field has been abruptly changed, followed by a slow return to the level of steady-state absorption. The recovery time decreases with increasing optical power. A simple theoretical analysis shows that under our experimental conditions the low power limit of the recovery time is determined by the ground relaxation time. In our case it is defined by a time-of-flight of rubidium atoms through laser beam. The obtained value of the ground state relaxation time is in a good agreement with result of direct measurements by ‘relaxation in the dark’ method. Our technique based on phase dynamics in EIT can be used for investigation of the ground state relaxation and the fast control of EIT. |
| Databáze: | OpenAIRE |
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