Optoacoustic generation and electrical detection of subnanosecond acoustic pulses

The optoacoustic generation and electrical detection of acoustic pulses of about 0.5‐ns duration in quartz and in several polymer materials is demonstrated. The ultrasonic pulses are generated by thermoelastic effects and/or ablation due to absorption of 70‐ps laser‐light pulses in an opaque coupling layer deposited on one of the sample surfaces. Detection of the acoustic pulses is possible by using electrically charged, piezoelectric, or biased samples which yield electrode signals upon transit of the pulses. The acoustic pulses have also have been used to measure ultrasonic velocity and attenuation in various materials.

[1]  C. Patel,et al.  Pulsed optoacoustic spectroscopy of condensed matter , 1981 .

[2]  Use of laser‐generated acoustic pulses to measure the electric field inside a solid dielectric , 1982 .

[3]  G. Dreyfus,et al.  Analysis of laser induced acoustic pulse probing of charge distributions in dielectrics , 1983 .

[4]  Gerhard M. Sessler,et al.  High-Resolution Laser-Pulse Method for Measuring Charge Distributions in Dielectrics , 1982 .

[5]  A. Demaria,et al.  LASER‐INDUCED MICROWAVE SOUND BY SURFACE HEATING , 1967 .

[6]  Pulsed‐laser generation of ultrashort acoustic pulses: Application for thin‐film ultrasonic measurements , 1984 .

[7]  Reimund Gerhard-Multhaupt,et al.  Analysis of pressure-wave methods for the nondestructive determination of spatial charge or field distributions in dielectrics , 1983 .

[8]  K. Young,et al.  Theory of the pulsed optoacoustic technique , 1982 .

[9]  S. R. Kurtz,et al.  Direct observation of field-injected space charge in a metal-insulator-metal structure , 1984 .

[10]  Gerhard M. Sessler,et al.  Investigation of piezoelectricity distributions in poly(vinylidene fluoride) by means of quartz‐ or laser‐generated pressure pulses , 1984 .

[11]  B. Sullivan,et al.  Profile of laser‐produced acoustic pulse in a liquid , 1983 .

[12]  J. West,et al.  Nondestructive Laser Method for Measuring Charge Profiles in Irradiated Polymer Films , 1982, IEEE Transactions on Nuclear Science.

[13]  Wolfgang Eisenmenger,et al.  Observation of charge compensated polarization zones in polyvinylindenfluoride (PVDF) films by piezoelectric acoustic step wave response , 1982 .

[14]  Jean-Marc Heritier,et al.  Electrostrictive limit and focusing effects in pulsed photoacoustic detection , 1983 .

[15]  Gérard Dreyfus,et al.  Stress-Wave Probing of Electric Field Distributions in Dielectrics , 1981 .