Abstract

Charge profiles in various electret films are mapped with a resolution of 7 nm, using thermal pulses generated by the absorption of picosecond excimer-laser pulses. The use of these films for calorimetry and thermometry of radiation-induced transient heating with a time resolution of 350 psec is demonstrated, and applications for their use as ultrafast detectors for ultrasound are discussed.

© 1989 Optical Society of America

Second-harmonic generation and absorption studies of polymer–dye films oriented by corona-onset poling at elevated temperatures

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