▎ 摘　　要

We demonstrate that reduced graphene oxide coated thin polydimethylsiloxane ( rGO-PDMS) film is an effective optoacoustic transmitter for generating high pressure and high frequency ultrasound, previously unattainable using other techniques. Various coatings such as rGO-Aluminum, rGO-PDMS, PDMS-alone, and aluminum-alone are deposited on the glass substrate. Under a pulsed laser excitation, rGO-PDMS transmitter generated remarkable optoacoustic pressure which is 76 times stronger than Al-alone, 5 times stronger than PDMS-alone, and 2.2 times stronger than rGO-Al transmitter. The observed signal enhancement persisted over a broadband frequency range, and thus by optimizing the thermoelasticity of PDMS film and the thermal conductivity of rGO, a promising optoacoustic wave generation was confirmed for laser-induced ultrasound applications. (C) 2015 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution 3.0 Unported License.