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Coherent manipulation of optical magnetic spin angular momentum of two-wave interference in atomic medium

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Abstract

A four-level ladder-type atomic configuration of the sodium atom from the \(D_1\)-line is driven by the probe field and two interacting control fields is used to manipulate and control coherently the magnetic spin density of the probe field via electromagnetically induced transparency (EIT). In this technique, a weak probe laser beam is applied in the presence of a strong control laser beam, which creates a transparency window in the medium, allowing the probe beam to pass through with minimal absorption. By controlling the relative phase and polarization of the probe and control beams, the angular momentum of the probe beam can be manipulated and controlled coherently. Substantial variation is investigated in the behavior of the graphs of two interfering waves with the Rabi frequencies of the control field, detuning of the probe and control fields and the angle between the two interfering waves. Magnetic spin vector field distribution and magnetic spin density of circularly, diagonally and linearly polarized probe light field are coherently controlled and modified. The major role in this modification is played by the detuning of the probe field and the parameters of the control fields. This modified work in magnetic spin density and magnetic spin AM vector field arrow distribution is useful in the unidirectional optical interfaces, birefringence and the quantum spin Hall effect of the light beam.

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Authors and Affiliations

  1. Department of Physics, GPGC Timergara, University of Malakand, Timergara, KPK, Pakistan

    Rohullah Safi, Muhammad Tariq & Amir Hamza

Authors
  1. Rohullah Safi
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  2. Muhammad Tariq
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  3. Amir Hamza
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Contributions

Mr. R and Dr. MT have worked in four-level model of rubidium-87 and also derive the relationship between the magnetic spin density of light and control field parameters of the medium. Dr. MT and AH worked in the results and contribution section in explaining the graphs and giving physical interpretation to it. Dr. MT supervised the whole manuscript.

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Correspondence to Muhammad Tariq.

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Safi, R., Tariq, M. & Hamza, A. Coherent manipulation of optical magnetic spin angular momentum of two-wave interference in atomic medium. J Opt 52, 2199–2206 (2023). https://doi.org/10.1007/s12596-023-01133-w

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  • DOI: https://doi.org/10.1007/s12596-023-01133-w

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