Measurement of the Resonant Characteristics of a Single Bubble Vibration by Using a Laser Doppler Vibrometer

作者：Yoshikawa Taisuke^*; Kotera Hironori; Yoshida Kenji; Koyama Daisuke; Nakamura Kentaro; Watanabe Yoshiaki

来源：Japanese Journal of Applied Physics, 2011, 50(7): 07HE04.

DOI：10.1143/JJAP.50.07HE04

We constructed the experimental system with a laser Doppler vibrometer (LDV) for measuring the vibration of a single microbubble. It was demonstrated that the system enabled the capture of the vibration with an amplitude of nanometer order. We attempted to experimentally measure the resonant characteristics of a bubble attached to a wall by using the system. As a result, we succeeded in measuring the characteristics and evaluating the Q factor and the resonant radius at a driving frequency of 27.8 kHz, although these values are different from those predicted on the basis of the theory for a single free bubble. The LDV measurement system is expected to an effective tool for evaluating bubble vibrations with very small displacement amplitudes, such as the vibration of a microcapsule.

• 出版日期2011-7