Enhanced rotary photon drag via phase and angular momentum dependent Raman gain in a Mach-Zehnder type Sagnac interferometer
Quantum Optics and Quantum Information Research Group, Department of Physics, University of Malakand, Khyber Pakhtunkhwa, Pakistan
Accepted: 25 November 2022
Published online: 12 December 2022
The dependence of phase and orbital angular momentum (OAM) of the pump and control fields in a Raman gain-assisted four level atomic system using a Mach-Zehnder type Sagnac interferometer (MZSI) is proposed for the investigation of rotary photon drag. Gain doublets and normal/anomalous dispersion are noticed for appropriate values of strengths, phases and OAM of the pump and control fields. Relativistic group velocities of the two counter propagating beams are examined as a function of phase angle and fluctuations are observed for different values of the OAM. Significant improvements in the rotary photon drag angles from ±5 micro-radians to ± 1 centi-radians are achieved as a function of phase angle of the pump and control fields. The results obtained could have potential applications in rotation sensing technology, position control and optical communication technologies.
© The Author(s), under exclusive licence to Società Italiana di Fisica and Springer-Verlag GmbH Germany, part of Springer Nature 2022. 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.