Transparent High-Frequency Ultrasonic Transducer for Photoacoustic Microscopy Application
Jeeseong Hwang, Christopher S. Yung, Ruimin Chen, Yun He, Junhui Shi, Lihong Wang, Qifa Zhou
We report the development of an optically transparent high-frequency ultrasonic transducer using lithium niobate single-crystal and indium-tin-oxide electrodes with up to 90 % optical transmission in the visible to near infrared spectrum. The center frequency of the transducer was at 36.9 MHz with 33.9 %, at -6 dB fractional bandwidth. Photoacoustic imaging capability of the fabricated transducer was also demonstrated by successfully imaging a resolution target and mouse ear vasculatures in vivo, which were irradiated by a 532 nm pulse laser transmitted through the transducer.
IEEE Transactions on Ultrasonics Ferroelectrics and Frequency Control