Nonlinear photoacoustics for measuring the nonlinear optical absorption coefficient

Chandra S. Yelleswarapu, Sri Rajasekhar Kothapalli

Research output: Contribution to journalArticle

26 Citations (Scopus)

Abstract

We report a novel photoacoustic Z-scan (PAZ-scan) technique that combines the advantages offered by the conventional Z-scan method and the sensitivity of the photoacoustic detection. The sample is scanned through the focused laser beam and the generated photoacoustic signal is recorded using a 10 MHz focused ultrasound transducer. Since the signal strength is directly proportional to the optical absorption, PAZ-scan displays nonlinear behavior depicting the nonlinear optical absorption of the material. Among many advantages, our experiments on mouse blood show that PAZ-scan can potentially be used as a standard technique to calibrate contrast agents used in theranostics in general and photoacoustics in particular.

Original languageEnglish (US)
Pages (from-to)9020-9025
Number of pages6
JournalOptics Express
Volume18
Issue number9
DOIs
StatePublished - Apr 26 2010

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absorptivity
optical absorption
blood
mice
transducers
laser beams

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics

Cite this

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Nonlinear photoacoustics for measuring the nonlinear optical absorption coefficient. / Yelleswarapu, Chandra S.; Kothapalli, Sri Rajasekhar.

In: Optics Express, Vol. 18, No. 9, 26.04.2010, p. 9020-9025.

Research output: Contribution to journalArticle

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