Observation of wavelength-dependent generation efficiency of laser-induced ultrasonic surface acoustic waves on ceramic materials

Journal Article · Mon Dec 01 04:00:00 EST 1997 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.120500· OSTI ID:565536

Flannery, C M; Kelly, P V; Beechinor, J T; Crean, G M ^[1]

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1. National Microelectronics Research Centre, University College, Lee Maltings, Prospect Row, Cork (Ireland)

In this work, the efficiency of laser generation of surface acoustic waves (SAWs) in ceramic materials is reported to be wavelength dependent. A pulsed Nd:YAG laser operating at wavelengths of 1064 or 532 nm was used to generate SAWs on ceramic (silicon nitride and silicon carbide) and metal substrates. It was observed that 1064 nm radiation is more efficient than 532 nm radiation for SAW generation on ceramics, whereas the opposite is the case for metals. While the wavelength dependence of SAW generation efficiency in metals is due to stronger optical absorption at the shorter wavelength, the dependence for the ceramics is attributed to a longer absorption length at the longer wavelength. {copyright} {ital 1997 American Institute of Physics.}

• OSTI ID: 565536
• Journal Information: Applied Physics Letters, Journal Name: Applied Physics Letters Journal Issue: 26 Vol. 71; ISSN 0003-6951; ISSN APPLAB
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ABSORPTION
ACOUSTIC MEASUREMENTS
CERAMICS
LASER RADIATION
METALS
PHOTOACOUSTIC EFFECT
SILICON CARBIDES
SILICON COMPOUNDS
SILICON NITRIDES
SOUND WAVES