Document Type
Article
Publication Date
4-14-2010
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.
Recommended Citation
Yelleswarapu, Chandra S. and Kothapalli, Sri-Rajasekhar, "Nonlinear photoacoustics for measuring the nonlinear optical absorption coefficient" (2010). Physics Faculty Publications. 37.
https://scholarworks.umb.edu/physics_faculty_pubs/37
Publisher
Optical Society of America
Comments
Published in Optics Express, Vol. 18, Issue 9, pp. 9020-9025, 2009: http://dx.doi.org/10.1364/OE.18.009020.