Subpicoliter Magnetoptical Cavities
| Autor: | R. A. Chakalov, J. A. Haigh, Andrew J. Ramsay |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Physics
Mode volume Condensed matter physics Magnon Yttrium iron garnet Physics::Optics General Physics and Astronomy 02 engineering and technology 021001 nanoscience & nanotechnology Polarization (waves) Coupling (probability) 01 natural sciences 7. Clean energy chemistry.chemical_compound Resonator chemistry Ferromagnetism 0103 physical sciences Thin film 010306 general physics 0210 nano-technology |
| Zdroj: | Physical Review Applied |
| ISSN: | 2331-7019 |
| DOI: | 10.1103/physrevapplied.14.044005 |
| Popis: | 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 ($100\phantom{\rule{0.2em}{0ex}}\ensuremath{\mu}{\mathrm{m}}^{3}$) optical mode volume, approximately $50$ times smaller than previous devices. From this, we estimate that the magnon single-photon coupling rate is $G\ensuremath{\approx}50$ 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. |
| Databáze: | OpenAIRE |
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