Realization of a Chiral Photonic-Crystal Cavity with Broken Time-Reversal Symmetry
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arXiv
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| Auteurs principaux: | , , , , , , , , , |
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| Format: | Preprint |
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2025
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| _version_ | 1866918143311478784 |
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| author | Kulkarni, Kiran M. Xu, Hongjing Tay, Fuyang Rodriguez-Barrios, Gustavo M. Kim, Dasom Alabastri, Alessandro Rokaj, Vasil Dag, Ceren B. Baydin, Andrey Kono, Junichiro |
| author_facet | Kulkarni, Kiran M. Xu, Hongjing Tay, Fuyang Rodriguez-Barrios, Gustavo M. Kim, Dasom Alabastri, Alessandro Rokaj, Vasil Dag, Ceren B. Baydin, Andrey Kono, Junichiro |
| contents | Light-matter interactions in chiral cavities offer a compelling route to manipulate material properties by breaking fundamental symmetries such as time-reversal symmetry. However, only a limited number of chiral cavity implementations exhibiting broken time-reversal symmetry have been demonstrated to date. These typically rely on either the application of strong magnetic fields, circularly polarized Floquet driving, or the hybridization of cavity modes with matter excitations in the ultrastrong coupling regime. Here, we present a one-dimensional terahertz photonic-crystal cavity that exhibits broken time-reversal symmetry. The cavity consists of a high-resistivity silicon wafer sandwiched between lightly n-doped InSb wafers. By exploiting the nonreciprocal response of a terahertz magnetoplasma and the exceptionally low effective mass of electrons in InSb, we demonstrate a circularly polarized cavity mode at 0.67 THz under a modest magnetic field of 0.3 T, with a quality factor exceeding 50. Temperature-, magnetic field-, and polarization-dependent measurements, supported by simulations, confirm the realization of a chiral cavity with broken time-reversal symmetry. This platform offers a robust and accessible approach for exploring chiral light--matter interactions and vacuum dressed quantum condensed matter in the terahertz regime. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2509_14366 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Realization of a Chiral Photonic-Crystal Cavity with Broken Time-Reversal Symmetry Kulkarni, Kiran M. Xu, Hongjing Tay, Fuyang Rodriguez-Barrios, Gustavo M. Kim, Dasom Alabastri, Alessandro Rokaj, Vasil Dag, Ceren B. Baydin, Andrey Kono, Junichiro Optics Applied Physics Light-matter interactions in chiral cavities offer a compelling route to manipulate material properties by breaking fundamental symmetries such as time-reversal symmetry. However, only a limited number of chiral cavity implementations exhibiting broken time-reversal symmetry have been demonstrated to date. These typically rely on either the application of strong magnetic fields, circularly polarized Floquet driving, or the hybridization of cavity modes with matter excitations in the ultrastrong coupling regime. Here, we present a one-dimensional terahertz photonic-crystal cavity that exhibits broken time-reversal symmetry. The cavity consists of a high-resistivity silicon wafer sandwiched between lightly n-doped InSb wafers. By exploiting the nonreciprocal response of a terahertz magnetoplasma and the exceptionally low effective mass of electrons in InSb, we demonstrate a circularly polarized cavity mode at 0.67 THz under a modest magnetic field of 0.3 T, with a quality factor exceeding 50. Temperature-, magnetic field-, and polarization-dependent measurements, supported by simulations, confirm the realization of a chiral cavity with broken time-reversal symmetry. This platform offers a robust and accessible approach for exploring chiral light--matter interactions and vacuum dressed quantum condensed matter in the terahertz regime. |
| title | Realization of a Chiral Photonic-Crystal Cavity with Broken Time-Reversal Symmetry |
| topic | Optics Applied Physics |
| url | https://arxiv.org/abs/2509.14366 |