Raman–Ramsey electromagnetically induced transparency in the configuration of counterpropagating pump and probe in vacuum Rb cell
| Autor: | Branislav M. Jelenkovic, Dragan V. Lukić, Marina M. Lekić, Milan Radonjić, Zoran D. Grujić, I. S. Radojičić |
|---|---|
| Rok vydání: | 2015 |
| Předmět: |
Materials science
Zeeman effect Electromagnetically induced transparency business.industry Physics::Optics Resonance Statistical and Nonlinear Physics Laser Atomic and Molecular Physics and Optics law.invention symbols.namesake Laser linewidth Optics law Electric field symbols Spontaneous emission Physics::Atomic Physics Raman spectroscopy business |
| Zdroj: | Journal of the Optical Society of America B. 32:426 |
| ISSN: | 1520-8540 0740-3224 |
| DOI: | 10.1364/josab.32.000426 |
| Popis: | Counterpropagating, spatially separated hollow pump and coaxial probe laser beams generate narrow Zeeman electromagnetically induced transparency (EIT) resonances in the vacuum Rb cell. The lasers are locked to D2 line transition Fg=2→Fe=1 of Rb87. For the probe laser beam intensity between 0.1 and 3.0 mW/cm2 this Ramsey-type configuration yields dual-structured resonances having a narrow peak on top of a broader pedestal. Linewidths of the narrow peak are nearly independent of the probe laser beam intensity and of the probe diameter (for diameters 0.8 and 2.7 mm), provided that the dark region between the pump and the probe beams is fixed. At the probe laser beam intensities below 0.1 mW/cm2 Zeeman EIT is a single narrow resonance. With this geometry of laser beams, and at low probe intensity, the presence of the pump enables the probe EIT, i.e., the probe transmission becomes enhanced in a narrow spectral window. Accompanying theoretical model showed good quantitative agreement with the measurements. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|