Exceptionally high Verdet constant in gold nanodisc arrays
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arXiv
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| Format: | Preprint |
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2025
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| _version_ | 1866918231391862784 |
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| author | Mulay, Gajendra Choudhary, Shraddha Tulapurkar, Ashwin A Ignatyeva, Daria O Belotelov, Vladimir I Prabhu, Shriganesh S Achanta, Venu Gopal |
| author_facet | Mulay, Gajendra Choudhary, Shraddha Tulapurkar, Ashwin A Ignatyeva, Daria O Belotelov, Vladimir I Prabhu, Shriganesh S Achanta, Venu Gopal |
| contents | Magneto-optical effects in non-magnetic noble metals can be greatly enhanced by leveraging the in-plane Lorentz force at engineered plasmonic resonances. We demonstrate a 2D array of gold nanodiscs designed to host a hybrid resonance of localized plasmon and surface lattice modes. The structure exhibits a Verdet constant of 1.98e6 deg/T.m, corresponding to a Faraday rotation of -0.15 deg at a 1 T magnetic field. This Verdet constant represents a 15-fold enhancement over unpatterned gold and is highly competitive with many plasmon-enhanced diamagnetic nanostructures. These findings offer new opportunities for harnessing strong magneto-plasmonic effects in optoelectronic devices by patterning common non-magnetic metals. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2512_04608 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Exceptionally high Verdet constant in gold nanodisc arrays Mulay, Gajendra Choudhary, Shraddha Tulapurkar, Ashwin A Ignatyeva, Daria O Belotelov, Vladimir I Prabhu, Shriganesh S Achanta, Venu Gopal Optics Materials Science Magneto-optical effects in non-magnetic noble metals can be greatly enhanced by leveraging the in-plane Lorentz force at engineered plasmonic resonances. We demonstrate a 2D array of gold nanodiscs designed to host a hybrid resonance of localized plasmon and surface lattice modes. The structure exhibits a Verdet constant of 1.98e6 deg/T.m, corresponding to a Faraday rotation of -0.15 deg at a 1 T magnetic field. This Verdet constant represents a 15-fold enhancement over unpatterned gold and is highly competitive with many plasmon-enhanced diamagnetic nanostructures. These findings offer new opportunities for harnessing strong magneto-plasmonic effects in optoelectronic devices by patterning common non-magnetic metals. |
| title | Exceptionally high Verdet constant in gold nanodisc arrays |
| topic | Optics Materials Science |
| url | https://arxiv.org/abs/2512.04608 |