Subpicoliter Magnetoptical Cavities
Microwave-to-optical conversion via ferromagnetic magnons has so far been limited by the optical coupling rates achieved in millimeter-scale whispering-gallery-mode resonators. Toward overcoming this limitation, we propose and demonstrate an open magneto-optical cavity containing a thin film of yttr...
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Veröffentlicht in: | Physical review applied 2020-10, Vol.14 (4), Article 044005 |
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Format: | Artikel |
Sprache: | eng |
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Zusammenfassung: | Microwave-to-optical conversion via ferromagnetic magnons has so far been limited by the optical coupling rates achieved in millimeter-scale whispering-gallery-mode resonators. Toward overcoming this limitation, we propose and demonstrate an open magneto-optical cavity containing a thin film of yttrium iron garnet (YIG). We achieve a 0.1 pL (100 mu m(3)) optical mode volume, approximately 50 times smaller than previous devices. From this, we estimate that the magnon single-photon coupling rate is G approximate to 50 Hz. This open-cavity design offers the prospect of wavelength-scale mode volumes, small polarization splittings, and good magneto-optical mode overlap. With achievable further improvements and optimization, efficient microwave-optical conversion and magnon cooling devices become a realistic possibility. |
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ISSN: | 2331-7019 2331-7019 |
DOI: | 10.1103/PhysRevApplied.14.044005 |