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Active chiral control of GHz acoustic whispering-gallery modes
| 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)
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Submitter: 松田 理
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