Ultrasound generation through photoacoustic principle is a promising method for novel ultrasonic applications. This paper describes a photoacoustic generation method using gold nanostructure fabricated by a femtosecond laser. A nanopattern was fabricated on a quartz substrate. A gold film with a thickness of 50 nm was thermally deposited on the nanoparttern to form a gold nanostructure. The quartz substrate with the gold nanostructure was excited by a nanosecond laser to generate acoustic signals via photoacoustic principle. A quartz substrate coated with a 50 nm thickness gold layer was excited in the same condition for the comparison purpose. Experiment results showed that acoustic signals with amplitudes of 1.56 kPa at a distance of 1.5 mm away from the substrate were generated under the laser energy density of 0.27 mJ/cm2.
- Dynamic Systems and Control Division
Photoacoustic Generation Using Gold Nanostructure Fabricated by Femtosecond Laser
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Wu, N, Tian, Y, Zou, X, & Wang, X. "Photoacoustic Generation Using Gold Nanostructure Fabricated by Femtosecond Laser." Proceedings of the ASME/ISCIE 2012 International Symposium on Flexible Automation. ASME/ISCIE 2012 International Symposium on Flexible Automation. St. Louis, Missouri, USA. June 18–20, 2012. pp. 199-203. ASME. https://doi.org/10.1115/ISFA2012-7140
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