https://doi.org/10.1140/epjp/s13360-023-03894-6
Regular Article
Transmission and dispersion management of room-temperature atomic vapor medium of 
Rb using EIT protocol
Department of Physics, Indian Institute of Technology Patna, 801103, Bihta, Patna, Bihar, India
Received:
20
September
2022
Accepted:
14
March
2023
Published online:
1
April
2023
In this experimental work, we have studied electromagnetically induced transparency (EIT) phenomena in Rb atomic vapor medium in ladder system. In a novel experimental setting, probe light interacts with a vapor cell before being separated into two orthogonal components with the aid of a polarizing beam splitter (PBS). These orthogonal components are analyzed with varying degrees of probe polarization. A control over transmission and dispersion curve is obtained by changing the linear polarization state of the probe light beam with the help of half-wave plate (HWP) and quarter-wave plate before interaction with the atomic medium. By changing the probe’s polarization state in relation to the coupling polarization, we were able to significantly increase the contrast of EIT signal and relative gain in the dispersion slope. We observed a transition in the dispersion profile from normal to anomalous in the transmitted signal from PBS while varying the HWP angle. Observations made in this paper have potential application towards group velocity manipulation, storage of quantum information, precision measurement, and optical switching.
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© The Author(s), under exclusive licence to Società Italiana di Fisica and Springer-Verlag GmbH Germany, part of Springer Nature 2023. Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.
