Center frequency

Bandwidth (computing)

Photoacoustic effect

Materials science

Microscopy

Layer (electronics)

Acoustic microscopy

Telecommunications

Ultrasonic sensor

Computer science

Acoustics

Computer network

Laser

Transducer

Physics

Nanotechnology

Optics

Lithium niobate

Composite material

Photoacoustic imaging in biomedicine

Band-pass filter

Ultrasonic imaging

Optoelectronics

Indium tin oxide

IEEE Transactions on Ultrasonics Ferroelectrics and Frequency Control

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. The 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.

Transparent High-Frequency Ultrasonic Transducer for Photoacoustic Microscopy Application