Active chiral control of GHz acoustic whispering-gallery modes
We selectively generate chiral surface-acoustic whispering gallery modes in the gigahertz range on a microscopic disk by means of an ultrafast time-domain technique incorporating a spatial light modulator. Active chiral control is achieved by making use of an optical pump spatial profile in the form...
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| Format: | Article |
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American Institute of Physics
2017
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| Online Access: | https://eprints.nottingham.ac.uk/46457/ |
| _version_ | 1848797331549323264 |
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| author | Mezil, Sylvain Fujita, Kentaro Osuka, Paul H. Tomoda, Mononobu Clark, Matt Wright, Oliver B. Matsuda, Osamu |
| author_facet | Mezil, Sylvain Fujita, Kentaro Osuka, Paul H. Tomoda, Mononobu Clark, Matt Wright, Oliver B. Matsuda, Osamu |
| author_sort | Mezil, Sylvain |
| building | Nottingham Research Data Repository |
| collection | Online Access |
| description | We selectively generate chiral surface-acoustic whispering gallery modes in the gigahertz range on a microscopic disk by means of an ultrafast time-domain technique incorporating a spatial light modulator. Active chiral control is achieved by making use of an optical pump spatial profile in the form of a semicircular arc, positioned on the sample to break the symmetry of clockwise- and counterclockwise-propagating modes. Spatiotemporal Fourier transforms of the interferometrically monitored two-dimensional acoustic fields measured to micron resolution allow individual chiral modes and their azimuthal mode order, both positive and negative, to be distinguished. In particular, for modes with 15-fold rotational symmetry, we demonstrate ultrafast chiral control of surface acoustic waves in a micro-acoustic system with picosecond temporal resolution. Applications include nondestructive testing and surface acoustic wave devices. |
| first_indexed | 2025-11-14T20:02:11Z |
| format | Article |
| id | nottingham-46457 |
| institution | University of Nottingham Malaysia Campus |
| institution_category | Local University |
| last_indexed | 2025-11-14T20:02:11Z |
| publishDate | 2017 |
| publisher | American Institute of Physics |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | nottingham-464572020-05-04T19:10:22Z https://eprints.nottingham.ac.uk/46457/ Active chiral control of GHz acoustic whispering-gallery modes Mezil, Sylvain Fujita, Kentaro Osuka, Paul H. Tomoda, Mononobu Clark, Matt Wright, Oliver B. Matsuda, Osamu We selectively generate chiral surface-acoustic whispering gallery modes in the gigahertz range on a microscopic disk by means of an ultrafast time-domain technique incorporating a spatial light modulator. Active chiral control is achieved by making use of an optical pump spatial profile in the form of a semicircular arc, positioned on the sample to break the symmetry of clockwise- and counterclockwise-propagating modes. Spatiotemporal Fourier transforms of the interferometrically monitored two-dimensional acoustic fields measured to micron resolution allow individual chiral modes and their azimuthal mode order, both positive and negative, to be distinguished. In particular, for modes with 15-fold rotational symmetry, we demonstrate ultrafast chiral control of surface acoustic waves in a micro-acoustic system with picosecond temporal resolution. Applications include nondestructive testing and surface acoustic wave devices. American Institute of Physics 2017-10-03 Article PeerReviewed Mezil, Sylvain, Fujita, Kentaro, Osuka, Paul H., Tomoda, Mononobu, Clark, Matt, Wright, Oliver B. and Matsuda, Osamu (2017) Active chiral control of GHz acoustic whispering-gallery modes. Applied Physics Letters . ISSN 1077-3118 http://aip.scitation.org/doi/10.1063/1.4994886 doi:10.1063/1.4994886 doi:10.1063/1.4994886 |
| spellingShingle | Mezil, Sylvain Fujita, Kentaro Osuka, Paul H. Tomoda, Mononobu Clark, Matt Wright, Oliver B. Matsuda, Osamu Active chiral control of GHz acoustic whispering-gallery modes |
| title | Active chiral control of GHz acoustic whispering-gallery modes |
| title_full | Active chiral control of GHz acoustic whispering-gallery modes |
| title_fullStr | Active chiral control of GHz acoustic whispering-gallery modes |
| title_full_unstemmed | Active chiral control of GHz acoustic whispering-gallery modes |
| title_short | Active chiral control of GHz acoustic whispering-gallery modes |
| title_sort | active chiral control of ghz acoustic whispering-gallery modes |
| url | https://eprints.nottingham.ac.uk/46457/ https://eprints.nottingham.ac.uk/46457/ https://eprints.nottingham.ac.uk/46457/ |