Optical generation of high frequency ultrasound using a two dimensional array of gold nanoparticles

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

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

2 Scopus citations

Abstract

The thermoelastic effect in a thin film is used to produce high-frequency, high-intensity ultrasound for applications in water and soft tissue. We have fabricated a structure that consists of 2-D arrangements of gold nanoparticles, sandwiched between a transparent substrate and a 4.5 μm thick PDMS layer. The acoustic signal displays significant improvements compared to a bulk black PDMS film (the current state of the art) at frequencies from 50-100 MHz. When a 5 ns laser pulse with energy of 25 μJ is delivered to a spot size of 25 μm, the acoustic pressure can reach 500 kPa at a distance of 10 mm away from the film surface. We also propose a convenient method to construct an integrated transmit/receive optoacoustic array based on the high optical extinction ratio of the film. These results show that this PDMS film with 2D array of gold nanoparticles can be used to produce high-frequency arrays for ultrasound imaging.

Original languageEnglish (US)
Title of host publication2006 IEEE International Ultrasonics Symposium, IUS
Pages401-404
Number of pages4
DOIs
StatePublished - Dec 1 2006
Event2006 IEEE International Ultrasonics Symposium, IUS - Vancouver, BC, Canada
Duration: Oct 3 2006Oct 6 2006

Publication series

NameProceedings - IEEE Ultrasonics Symposium
Volume1
ISSN (Print)1051-0117

Other

Other2006 IEEE International Ultrasonics Symposium, IUS
Country/TerritoryCanada
CityVancouver, BC
Period10/3/0610/6/06

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