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<p>The optical behavior of a weak probe pulse propagating through a rotating atomic medium is theoretically investigated under the combined influence of Doppler broadening and spontaneously generated coherence (SGC). Doppler broadening significantly modifies the absorption, dispersion, group index, and optical dragging angle of the probe field in the proposed atomic configuration. The coherent effect of SGC is employed as an additional control parameter to manipulate the dragging angle of the propagating probe pulse. Both subluminal and superluminal light propagation regimes are demonstrated within the same system. At specific values of the SGC parameter, a reversal in the sense of rotation of the dragging angle relative to the mechanical rotation of the medium is observed. These results indicate that the interplay between Doppler broadening, SGC, and medium rotation provides an effective mechanism for controlling light propagation in rotating atomic systems and may be useful for applications such as optical switching and controlled image rotation.</p>

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Control over the Dragging effect of light pulse via spontaneously generated coherence and Doppler broadening in a spinning medium

  • 期刊论文

  • 发表日期：

    2026年3月18日

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  • Shabir Ahmad,
  • Habibur Rahman,
  • Sedra Khan,
  • Muneeba Hayat,
  • Muhammad Sajjad,
  • Wasif Ur Rehman

摘要

The optical behavior of a weak probe pulse propagating through a rotating atomic medium is theoretically investigated under the combined influence of Doppler broadening and spontaneously generated coherence (SGC). Doppler broadening significantly modifies the absorption, dispersion, group index, and optical dragging angle of the probe field in the proposed atomic configuration. The coherent effect of SGC is employed as an additional control parameter to manipulate the dragging angle of the propagating probe pulse. Both subluminal and superluminal light propagation regimes are demonstrated within the same system. At specific values of the SGC parameter, a reversal in the sense of rotation of the dragging angle relative to the mechanical rotation of the medium is observed. These results indicate that the interplay between Doppler broadening, SGC, and medium rotation provides an effective mechanism for controlling light propagation in rotating atomic systems and may be useful for applications such as optical switching and controlled image rotation.