Title :
Efficient excitation of bulk and surface acoustic waves by laser light
Author :
Noge, Satoru ; Kurita, Mie ; Uno, Takahiko
Author_Institution :
Kanagawa Inst. of Technol., Japan
Abstract :
We previously proposed a piezoelectric sensor configuration with an optical-access method and reported on simulation results. Two problems exist to the fabrication of such a sensor; one is developing a suitable optical-to-electric conversion technique, and the other is developing on optical measurement method for piezoelectric resonance. We examined the use of a Schottky-barrier photo diode (SBPD) for photoelectric conversion to excite piezoelectric vibration in the VHF region. We found that the photoelectric output of SBPD corresponds to the intensity of the modulated light. The excitation power of piezoelectric vibration is between to μW (at 70 MHz) and 32 μW (at 50 MHz). We report on an optical-to-electrical conversion method that uses on SBPD
Keywords :
Schottky diodes; photoacoustic effect; photodiodes; piezoelectric oscillations; surface acoustic waves; 10 to 32 muW; 70 to 50 MHz; Schottky barrier photodiode; VHF region; bulk acoustic wave; laser light excitation; optical access; optical measurement; photoelectric conversion; piezoelectric resonance; piezoelectric sensor; piezoelectric vibration; surface acoustic wave; Acoustic measurements; Acoustic sensors; Acoustic waves; Laser excitation; Optical device fabrication; Optical modulation; Optical sensors; Optical surface waves; Surface acoustic waves; Surface emitting lasers;
Conference_Titel :
Ultrasonics Symposium, 2000 IEEE
Conference_Location :
San Juan
Print_ISBN :
0-7803-6365-5
DOI :
10.1109/ULTSYM.2000.922629
