Applied Physics Letters · 2001 · 137 citations · 5 references
Medical UltrasoundEngineeringBroadband UltrasoundMechanical EngineeringConversion EfficiencyLaser ApplicationsElastomeric FilmThermoelastic EffectPower UltrasoundUltrasound PhysicsMaterials ScienceFocused UltrasoundUltrasonicsAcoustic PropagationUltrasoundApplied PhysicsElastographyThermoelastic ExpansionLaser UltrasoundMedicineMechanics Of MaterialsMicromachined Ultrasonic Transducer
The thermoelastic effect was used to produce high-frequency, broadband ultrasound in water. A pulsed diode laser, followed by an erbium-doped fiber amplifier, was focused onto a light-absorbing film deposited on a glass substrate. Conversion efficiency was improved by over 20 dB using an elastomeric film instead of a more commonly used metallic one. Radiation pattern measurements show that considerable energy is radiated at +/−45° for frequencies beyond 50 MHz. These results show that the thermoelastic effect can be used to produce phased arrays for high-frequency ultrasound imaging.
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Laser-induced stress-wave and impulse augmentation
J. D. O’Keefe, C. H. Skeen · Applied Physics Letters · 1972 · 82 citations
LASER-INDUCED MICROWAVE SOUND BY SURFACE HEATING
M. J. Brienza, A. J. DeMaria · Applied Physics Letters · 1967 · 46 citations