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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

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Sylvain Mezil

Kentaro Fujita

Paul H. Osuka

Mononobu Tomoda

Professor of Applied Optics

Oliver B. Wright

Osamu Matsuda


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.


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,

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
Public URL
Publisher URL


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