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<p>We investigate both photothermally induced transparency and optomechanically induced transparency within a hybrid optomechanical system. The left cavity of this system contains a Bose–Einstein condensate that is confined within and examined using pump and probe fields. The right cavity is linked to mechanical oscillation through the photothermal effect. We observe a transition from a single window to multiple windows by varying multiple coupling constants such as intercavity coupling, optomechanical coupling, and the strength of condensate-cavity coupling. The absorption and dispersion spectra for photothermally induced transparency and optomechanically induced transparency are discussed. Increasing coupling strength yields multiple transparency windows and modified slow-light behavior. Stronger optomechanical coupling induces extra window splitting and group delay enhancement. We show that the photothermal coefficient can be used to effectively tune the amplitude and window width of the transparency feature. Our results highlight the significance of using the effects of both photothermal and optomechanical interaction to engineer tunable transparency useful for photonic systems, signal control, and future technologies based on coherent light–matter interaction.</p>

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Photothermal Transparency in Hybrid Coupled Cavities Incorporating a Bose–Einstein Condensate and a Mechanical Resonator

  • 期刊论文

  • 发表日期：

    2026年3月12日

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  • M. Imtiaz Khan,
  • Fatima Kosar,
  • Soma Bashir,
  • Nusrat Riaz,
  • Ziauddin

摘要

We investigate both photothermally induced transparency and optomechanically induced transparency within a hybrid optomechanical system. The left cavity of this system contains a Bose–Einstein condensate that is confined within and examined using pump and probe fields. The right cavity is linked to mechanical oscillation through the photothermal effect. We observe a transition from a single window to multiple windows by varying multiple coupling constants such as intercavity coupling, optomechanical coupling, and the strength of condensate-cavity coupling. The absorption and dispersion spectra for photothermally induced transparency and optomechanically induced transparency are discussed. Increasing coupling strength yields multiple transparency windows and modified slow-light behavior. Stronger optomechanical coupling induces extra window splitting and group delay enhancement. We show that the photothermal coefficient can be used to effectively tune the amplitude and window width of the transparency feature. Our results highlight the significance of using the effects of both photothermal and optomechanical interaction to engineer tunable transparency useful for photonic systems, signal control, and future technologies based on coherent light–matter interaction.