Quantitative study of the destructive quantum-interference effect on coherent population trapping
| Autor: | E. Breschi, Roland Lammegger, B. G. Matisov, Laurentius Windholz, Georgy A. Kazakov, Gaetano Mileti |
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| Jazyk: | angličtina |
| Rok vydání: | 2010 |
| Předmět: |
Physics
education.field_of_study Linear polarization business.industry Population Physics::Optics Trapping Laser 01 natural sciences Atomic and Molecular Physics and Optics law.invention 010309 optics Laser linewidth Optics law Excited state 0103 physical sciences Physics::Atomic Physics Atomic physics 010306 general physics business Spectroscopy education Coherence (physics) |
| Popis: | We investigate experimentally and theoretically the coherent population trapping (CPT) effect occurring in $^{87}\text{R}\text{b}$ ${D}_{1}$ line due to the interaction with linearly polarized laser light ($\text{lin}\ensuremath{\parallel}\text{lin}$ CPT). In this configuration, the coherence is strongly influenced by the structure of the excited state; consequently, the quantum interference between dark states is an essential feature of this interaction scheme. We study the $\text{lin}\ensuremath{\parallel}\text{lin}$ CPT resonance as a function of the laser optical detuning. The comparison between experimental and theoretical results allows us to quantify the contribution from different dark states to the total signal. Based on these results, we investigate the signal depending on both the pressure broadening of the optical transition and the laser linewidth, and we find in which conditions the laser linewidth does not degrade the $\text{lin}\ensuremath{\parallel}\text{lin}$ CPT resonance. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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