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S. GHEZALI1,* , A. TALEB2
A research project at the “Laboratoire d'électronique quantique” consists in a theoretical study of the reflection and diffraction phenomena via an atomic mirror. This paper presents the principle of an evanescent wave atomic mirror. Many groups in the world have constructed this type of atom optics experiments such as in Paris-Orsay-Villetaneuse (France), Stanford-Gaithersburg (USA), Munich-Heidelberg (Germany), etc….. A laser beam goes into a prism with an incidence larger than the critical incidence. It undergoes a total reflection on the plan face of the prism and then exits. The transmitted resulting wave out of the prism is evanescent and repulsive as the pulsation detuning of the laser beam compared to the atomic transition Δ = ωL- ω0 is positive. The cold atomic sample interacts with this evanescent wave and undergoes one or more elastic bounces by passing into backward points in its trajectory because the atoms' kinetic energy (of the order of the μeV) is less than the maximum of the dipolar potential barrier ћΩ2/Δ where Ω is the Rabi pulsation [1]. The dipolar potential with which interact the slow atoms is obtained for a two level atom in a case of a dipolar electric transition (D2 Rubidium transition at a wavelength of 780 nm delivered by a Titane-Saphir laser between a fundamental state Jf = 1/2 and an excited state Je = 3/2). This potential is corrected by an attractive Van der Waals term [2]..
Atom optics, Atomic and molecular physics.
S. GHEZALI, A. TALEB, An evanescent wave atomic mirror, Optoelectronics and Advanced Materials - Rapid Communications, 4, 10, October 2010, pp.1457-1460 (2010).
Submitted at: April 20, 2010
Accepted at: Oct. 14, 2010
Optoelectronics and Advanced Materials - Rapid Communications
(2023): 0.5 - 2023 Journal Citation Reports (Clarivate Analytics, 2024)
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