Electromagnetically Induced Transparency and optical pumping processes formed in Cs sub-micron thin cell |
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| Authors: | A Sargsyan C Leroy Y Pashayan-Leroy D Sarkisyan D Slavov S Cartaleva |
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| Institution: | 1. Institute for Physical Research, NAS of Armenia, Ashtarak, 0203, Armenia;3. Institute of Electronics, Bulgarian Academy of Sciences, 72 Tzarigradsko Shosse Boulevard, 1784 Sofia, Bulgaria;1. Air Force Research Laboratory, 3550 Aberdeen Ave SE, Kirtland Air Force Base, NM 87117, USA;2. The Boeing Company, 4411 The 25 Way NE #350, Albuquerque, NM 87109, USA;1. Department of Physics, Islamic Azad University, Bonab Branch, Bonab, Iran;2. Institute of Theoretical Physics and Astronomy, Vilnius University, A. Gostauto 12, LT-01108 Vilnius, Lithuania;3. Research Institute for Applied Physics, University of Tabriz, Tabriz, Iran;1. Institute of Spectroscopy Russian Academy of Sciences, 108840 Fizicheskaya str., 5, Troitsk, Moscow, Russia;2. National Research University, Higher School of Economics, 101000, Myasnitskaya str., 20, Moscow, Russia;3. Moscow State Pedagogical University, 119435, Malaya Pirogovskaya 1/1, Moscow, Russia;4. P.N. Lebedev Physical Institute of the Russian Academy of Sciences, Troitsk Branch, 108840, Fizicheskaya Str., 11, Troitsk, Moscow, Russia;1. Laboratory of Theoretical Spectroscopy, V.E. Zuev Institute of Atmospheric Optics, Siberian Branch, Russian Academy of Sciences, 1, Academician Zuev Square, 634021 Tomsk, Russia;2. Laboratory of Molecular Spectroscopy, V.E. Zuev Institute of Atmospheric Optics, Siberian Branch, Russian Academy of Sciences, 1, Academician Zuev Square, 634021 Tomsk, Russia;3. Laboratory of Atmospheric Absorption Spectroscopy, V.E. Zuev Institute of Atmospheric Optics, Siberian Branch, Russian Academy of Sciences, 1, Academician Zuev Square, 634021 Tomsk, Russia |
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| Abstract: | The Electromagnetically Induced Transparency (EIT) effect in a Λ-system formed by Cs atoms (6S1/2 ? 6P3/2 ? 6S1/2) confined in an extremely thin cell (ETC) (atomic column thickness L varies in the range of 800 nm –3 µm is studied both experimentally and theoretically. It is demonstrated that when the coupling laser frequency is in exact resonance with the corresponding atomic transition, the EIT resonance parameters weakly depend on L, which allows us to detect the effect at L = λ = 852 nm. EIT process reveals a striking peculiarity in case of the coupling laser detuned by Δ from the atomic transition, namely the width of the EIT resonance rapidly increases upon an increase in Δ (an opposite effect is observed in centimeter-scale cells). The strong broadening of the EIT resonance for large values of detunings Δ is caused by the influence of atom-wall collisions on dephasing rate of coherence. The influence of the coupling laser on the velocity selective optical pumping/saturation resonances formed in ETC has been also studied. The theoretical model well describes the observed results. |
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