Title

Femtosecond two-photon absorption measurements based on the accumulative photothermal effect and the Rayleigh interferometer

Authors

Authors

L. Rodriguez; H. Y. Ahn;K. D. Belfield

Abbreviated Journal Title

Opt. Express

Keywords

EXCITATION CROSS-SECTIONS; HIGH-REPETITION-RATE; SENSITIVE MEASUREMENT; NM; LIQUIDS; CS2; Optics

Abstract

A rapid, straightforward method for measuring the two-photon absorption cross sections in liquid samples based on both the accumulative photo-thermal effect and the Rayleigh interferometery is described and demonstrated. This technique combines the sensitivity of the thermal lens approach and the accuracy of interferometry techniques. Focusing a high repetition rate laser beam in the sample, generating a localized change in its refractive index, induces the photo-thermal phase shift. By recording and processing two interference patterns, this technique allows the rapid estimation of the two-photon absorption cross section of the sample. Significantly, the experimental results demonstrate that this new method can be used with both fluorescent and non-fluorescent samples. (C) 2009 Optical Society of America

Journal Title

Optics Express

Volume

17

Issue/Number

22

Publication Date

1-1-2009

Document Type

Article

Language

English

First Page

19617

Last Page

19628

WOS Identifier

WOS:000271629200030

ISSN

1094-4087

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