Rawat, Harish Singh and Dubey, Satya Kesh and Ojha, Vijay Narain (2018) Distinction between double electromagnetically induced transparency and double Autler-Townes splitting in RF-driven four-level ladder Rb-87 atomic vapor. Journal of Physics B: Atomic, Molecular and Optical Physic, 51 (15). pp. 155401-155409. ISSN 0953-4075

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In this paper, the physical origin of interferences has been explored in a four-level cascade rubidium atom by simultaneous interaction with three energies; two optical fields and one radio frequency (RF) field. The atomic system is investigated by a combination of the analytical method introduced by Zhu et al (2010 Phys. Rev. A 81 053836) and resonant pole method introduced by Anisimov (2008 J. Mod. Opt. 55). A substantial amount of variation in the probe absorption has been observed in various regimes. The transition from electromagnetically induced transparency (EIT) to Autler-Townes spitting (ATS) is observed. It is found that a definite threshold value exists governing the crossover from EIT to ATS. The applied analytical method gives a clear insight into the nature of interferences; one may observe EIT as a consequence of destructive interference, whereas ATS is a consequence of constructive interference. Furthermore, a transition from single EIT to double electromagnetically induced transparency has been detected when the system is illuminated by RF-driving field in weak control regime. Further, transition from ATS to double Autler-Townes splitting has been observed in the strong control regime.

Item Type: Article
Additional Information: Copyright for this article belongs to M/S IOP Publishing.
Subjects: Physics > Atomic and Molecular Physics
Depositing User: Users 27 not found.
Date Deposited: 05 Dec 2019 11:19
Last Modified: 05 Dec 2019 11:19
URI: http://npl.csircentral.net/id/eprint/3845

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