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Title: Two-photon-induced excited-state absorption: Theory and experiment
Authors: Gu, B.
Ji, W. 
Patil, P.S.
Dharmaprakash, S.M.
Wang, H.-T.
Issue Date: 2008
Citation: Gu, B., Ji, W., Patil, P.S., Dharmaprakash, S.M., Wang, H.-T. (2008). Two-photon-induced excited-state absorption: Theory and experiment. Applied Physics Letters 92 (9) : -. ScholarBank@NUS Repository.
Abstract: We develop an open-aperture (OA) Z scan and nonlinear transmission theory of two-photon-induced excited-state absorption, under the excitation of spatial Gaussian laser pulses with temporal Gaussian and hyperbolic secant profiles. The found analytic expressions allow us to straightforwardly fit the OA Z -scan trace and the nonlinear transmission curve, for convenient extraction of the nonlinear absorption coefficients. As a test, the two-photon-induced excited-state absorption in a chalcone derivative of 3,4-dimethoxy- 4′ -fluorochalcone is explored by performing femtosecond Z -scan measurement and is analyzed by our theory. © 2008 American Institute of Physics.
Source Title: Applied Physics Letters
ISSN: 00036951
DOI: 10.1063/1.2841713
Appears in Collections:Staff Publications

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