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Abbaszadeh S, Samimi S, Golshan M M. Shift in the Atomic Absorption Resonance Frequency Due to Transfer of Angular Momentum from Laguerre-Gaussian Waves . ICOP & ICPET _ INPC _ ICOFS 2018; 24 :265-268
URL: http://opsi.ir/article-1-1623-en.html
URL: http://opsi.ir/article-1-1623-en.html
1- Physics Department, Shiraz University, Shiraz, Iran, 71946-84795
Abstract: (2482 Views)
The present article is concerned with the effects of phase damping and the motion of atomic center-of-mass involved in the interaction of a Laguerre-Gaussian wave and two-level atoms. To pursue this aim, we first present the total Hamiltonian, including both the electronic and center-of-mass Hamiltonians and then proceed to solve the corresponding master equation. To this end, the phase damping is explicitly included into the master equation. Making use of the solution to the later the polarization and, consequently, the corresponding susceptibility are calculated. We then demonstrate that the resonance frequency in the absorption spectrum, the detail of which depending on the transfer of orbital angular momenta (i.e., the number of vortices in the wave) suffers a shift. The present article, therefore, suggests that by a measurement on the absorption spectrum, the number of vortices in the Laguerre-Gaussian beam can be determined.
Keywords: Absorption Coefficient, Angular Momentum Transfer, Interaction of Atoms and Laguerre-Gaussian Waves, Motion Of Atomic Center-of-Mass, Phase Damping
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