Integrated all-optical ultrasound transducers

Yang Hou, Shai Ashkenazi, Sheng Wen Huang, Jin Sung Kim, L. Jay Guo, Matthew O'Donnell

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

A broadband all-optical ultrasound transducer has been designed, constructed and tested for high-frequency ultrasound imaging. It consists of a 3 μm PDMS layer sandwiched between a two-dimensional gold nanostructure and a 30 nm gold layer. A laser pulse at the resonance wavelength of the gold nanostructure is focused onto the surface for ultrasound generation, and a CW laser at a wavelength far from resonance is used as the probing beam. The signal to noise ratio of a pulse-echo signal from a 70 μm diameter transmit element combined with a 20 μm diameter receive element probing a near perfect reflector positioned 1.5 mm from the transducer surface is over 10 dB, and has the potential to be improved by at least another 40 dB, while the center frequency is 40 MHz with - 6 dB bandwidth of 57 MHz. A high-frequency ultrasound array has been emulated using multiple measurements from the transducer while mechanically scanning an imaging target. Characterizations of the device's optical and acoustical properties, as well as preliminary imaging results, strongly suggest that all-optical ultrasound transducers can be used to build high-frequency arrays for real-time high-resolution ultrasound imaging.

Original languageEnglish (US)
Title of host publication2007 IEEE Ultrasonics Symposium Proceedings, IUS
Pages715-718
Number of pages4
DOIs
StatePublished - Dec 1 2007
Event2007 IEEE Ultrasonics Symposium, IUS - New York, NY, United States
Duration: Oct 28 2007Oct 31 2007

Publication series

NameProceedings - IEEE Ultrasonics Symposium
ISSN (Print)1051-0117

Other

Other2007 IEEE Ultrasonics Symposium, IUS
CountryUnited States
CityNew York, NY
Period10/28/0710/31/07

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