https://doi.org/10.1140/epjp/s13360-024-04977-8
Regular Article
Group delayed phase switching of Gaussian light pulses via a thermal atomic medium
1
Department of Physics, COMSATS University Islamabad, 44000, Islamabad, Pakistan
2
Department of Physics, University of Peshawar, 25120, Peshawar, Pakistan
e
fazal_ghafoor@comsats.edu.pk
Received:
4
May
2023
Accepted:
30
January
2024
Published online:
26
February
2024
We show group delayed phase switching of a Gaussian pulse transmitting through a thermal four-level atomic medium using relative phase of the cyclically driven one microwave and two optical fields. The present scheme explains that in the presence of the atom’s dephasing reservoir, a plane-polarized probe light through the medium exhibits double electromagnetically induced transparency (EIT). Upon tuning the relative phase of the coupling fields, the double EIT converts into two asymmetric mirror inversion-like single EIT phenomenon. In parallel, we develop an input–output theory for probing Gaussian pulse through the thermal medium with a nonlinear dispersion to generate group delay (advancement) and switching of the group delay (advancement) using the relative phase of the driving fields. For collinear driving fields, the transmission of the pulses through the medium appears irrespective of the wave-vector mismatch and Doppler broadening effect. Consequently, the group delay and the group delay phase switching perform without measurable pulse distortion.
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© The Author(s), under exclusive licence to Società Italiana di Fisica and Springer-Verlag GmbH Germany, part of Springer Nature 2024. 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.