Spatially dependent optical bistability

Posted on 12.05.2022 - 22:14
The effect of the orbital angular momentum (OAM) of light beam and the helical phase front on Optical bistability (OB) phenomenon has been investigated in a three-level quantum system. In first step, we consider a $\Lambda$-type configuration in which the coupling field is assumed as a Laguerre-Gaussian (LG) beam. It is shown that the OB strength spatially depends on the intensity profile as well as the OAM of light beam. In second scheme, we apply a strong microwave field to the lower levels transition and obtain an analytical expression for the OB behavior of the probe field in the presence of an LG field in multi-photon resonance condition. We analytically obtain a generalized input-output bistability relation for the systems containing the LG beam. More complicated phase-dependent OB profiles can be obtained for higher order LG modes due to the OAM transfer and classical interference between the generated field and applied fields. The results of this paper may find potential applications in enhancing the capacity of the fast volatile bit-level optical memories.


MOUSAVI, SEYED MORTEZA; sabegh, Zahra Amini; Kheradmand, Reza; Mahmoudi, Mohammad (2022): Spatially dependent optical bistability. Optica Publishing Group. Collection.
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Journal of the Optical Society of America B


Zahra Amini sabegh
Reza Kheradmand
Mohammad Mahmoudi


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