Sylvain Mezil
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
Authors
Kentaro Fujita
Paul H. Osuka
Mononobu Tomoda
MATT CLARK matt.clark@nottingham.ac.uk
Professor of Applied Optics
Oliver B. Wright
Osamu Matsuda
Abstract
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.
Citation
Mezil, S., Fujita, K., Osuka, P. H., Tomoda, M., Clark, M., Wright, O. B., & Matsuda, O. (in press). Active chiral control of GHz acoustic whispering-gallery modes. Applied Physics Letters, https://doi.org/10.1063/1.4994886
Journal Article Type | Article |
---|---|
Acceptance Date | Aug 1, 2017 |
Online Publication Date | Oct 3, 2017 |
Deposit Date | Sep 18, 2017 |
Publicly Available Date | Oct 3, 2017 |
Journal | Applied Physics Letters |
Print ISSN | 0003-6951 |
Electronic ISSN | 1077-3118 |
Publisher | American Institute of Physics |
Peer Reviewed | Peer Reviewed |
DOI | https://doi.org/10.1063/1.4994886 |
Public URL | https://nottingham-repository.worktribe.com/output/886013 |
Publisher URL | http://aip.scitation.org/doi/10.1063/1.4994886 |
Contract Date | Sep 18, 2017 |
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