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Active chiral control of GHz acoustic whispering-gallery modes

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Please use this identifier to cite or link to this item:http://hdl.handle.net/2115/71590

Title: Active chiral control of GHz acoustic whispering-gallery modes
Authors: Mezil, Sylvain Browse this author
Fujita, Kentaro Browse this author
Otsuka, Paul H. Browse this author
Tomoda, Motonobu Browse this author →KAKEN DB
Clark, Matt Browse this author
Wright, Oliver B. Browse this author →KAKEN DB
Matsuda, Osamu Browse this author →KAKEN DB
Issue Date: 2-Oct-2017
Publisher: American Institute of Physics (AIP)
Journal Title: Applied physics letters
Volume: 111
Issue: 14
Start Page: 144103
Publisher DOI: 10.1063/1.4994886
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.
Rights: This article may be downloaded for personal use only. Any other use requires prior permission of the author and AIP Publishing.The following article appeared in http://aip.scitation.org/journal/apl and may be found at http://aip.scitation.org/doi/10.1063/1.4994886.
Type: article
URI: http://hdl.handle.net/2115/71590
Appears in Collections:工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 松田 理

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