Diffraction-free propagation of collimated saw around a quartz ball.

Noritaka Nakaso, Yusuke Tsukahara, Satoru Ishikawa, Kazushi Yamanaka

Research output: Contribution to journalConference articlepeer-review

21 Citations (Scopus)


A Ball SAW (Surface Acoustic Wave) device was fabricated on a single crystal quartz ball of 10 mm diameter. There were four specific routes on the surface of the ball along which the SAW was excited effectively showing round trips with low attenuation factors. One route was called the "Z-axis cylinder", and the other three routes were tri-symmetric meridians to the Z-axis of single crystal quartz ball. Their averaged velocities on "Z-axis cylinder" and other routes were 3.21*103 m/s and 3.57 - 3.61*103 m/s, respectively. On the "Z-axis cylinder", we could detect a signal in the 300th turn, and observed changes of delay time of the signals due to the temperature variation.

Original languageEnglish
Pages (from-to)47-52
Number of pages6
JournalProceedings of the IEEE Ultrasonics Symposium
Publication statusPublished - 2002 Dec 1
Event2002 IEEE Ultrasonics Symposium - Munich, Germany
Duration: 2002 Oct 82002 Oct 11

ASJC Scopus subject areas

  • Acoustics and Ultrasonics


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