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<p>We demonstrate the first experimental realization and coherent control of optomagnetically induced transparency (OMIT) and absorption (OMIA) in a cavity optomagnonic system. Utilizing a yttrium iron garnet (YIG) slab coupled to a Fabry-Pérot optical cavity, we harness magnon-mediated Brillouin scattering to enable phase-sensitive light manipulation. By tuning the phase of the microwave drive, we realize reconfigurable switching between OMIT and OMIA, together with continuous control of the group delay, reaching up to 16 µs. The system supports multiple magnon modes, allowing flexible multimode operation. Our results establish cavity optomagnonics as a powerful platform for light control via collective spin excitations and offer promising opportunities for hybrid quantum information processing and precision magnetometry.</p>

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Optomagnetically induced transparency and absorption in an actively driven cavity optomagnonic system

  • 期刊论文

  • 发表日期：

    2026年4月28日

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  • Wei-Jiang Wu,
  • Qi Hong,
  • Zi-Qi Wang,
  • Yuan-Peng Peng,
  • Yi-Pu Wang,
  • Jian-Qiang You

摘要

We demonstrate the first experimental realization and coherent control of optomagnetically induced transparency (OMIT) and absorption (OMIA) in a cavity optomagnonic system. Utilizing a yttrium iron garnet (YIG) slab coupled to a Fabry-Pérot optical cavity, we harness magnon-mediated Brillouin scattering to enable phase-sensitive light manipulation. By tuning the phase of the microwave drive, we realize reconfigurable switching between OMIT and OMIA, together with continuous control of the group delay, reaching up to 16 µs. The system supports multiple magnon modes, allowing flexible multimode operation. Our results establish cavity optomagnonics as a powerful platform for light control via collective spin excitations and offer promising opportunities for hybrid quantum information processing and precision magnetometry.