High-sensitivity laser-based acoustic microscopy using a modulated excitation source

T. W. Murray*, O. Balogun

*Corresponding author for this work

Research output: Contribution to journalArticle

30 Scopus citations

Abstract

A high-sensitivity photoacoustic microscopy system that uses an amplified electroabsorption modulated laser source for excitation was discussed. The system was found to be capable of detecting displacements in the femtometer range at frequencies up to 200 MHz. It was found that the detection bandwidth reduction afforded by this technique allows for a significant improvement in signal-to-noise ratio over systems using pulsed-laser excitation and broadband detection. It was suggested that the high sensitivity of the system makes it well suited for the characterization of thin films and micro- and nanoscale systems.

Original languageEnglish (US)
Pages (from-to)2974-2976
Number of pages3
JournalApplied Physics Letters
Volume85
Issue number14
DOIs
StatePublished - Oct 4 2004

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ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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