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Proceedings Paper

Influence of the excited state lifetimes on the photoacoustic signal
Author(s): Gregor Langer; Thomas Berer
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Paper Abstract

In this paper we discuss the influence of the excited state lifetimes of molecules onto the photoacoustic signal generation. Usually, photoacoustic signal generation is performed either with nanosecond laser pulses or modulation frequencies in the MHz up to the GHz regime. The molecules’ singlet relaxation times typically lie in the order of nanoseconds, while triplet lifetimes can be considerably longer. As both time scales, i.e. the laser pulse duration used for excitation and the relaxation times, lie in the same order of magnitude there exists an influence of the excited state lifetimes onto the photoacoustic signal generation. Here, we theoretically discuss at which frequencies this influence becomes significant and what impact this has on the performance and optimum design of photoacoustic microscopes.

Paper Details

Date Published: 19 February 2018
PDF: 8 pages
Proc. SPIE 10494, Photons Plus Ultrasound: Imaging and Sensing 2018, 1049465 (19 February 2018); doi: 10.1117/12.2290109
Show Author Affiliations
Gregor Langer, Research Ctr. for Non Destructive Testing GmbH (Austria)
Thomas Berer, Research Ctr. for Non Destructive Testing GmbH (Austria)


Published in SPIE Proceedings Vol. 10494:
Photons Plus Ultrasound: Imaging and Sensing 2018
Alexander A. Oraevsky; Lihong V. Wang, Editor(s)

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