28 March 2018 Z-scan study of nonlinear optical standards and D-A fluorophores considering fifth-order optical nonlinearities
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J. of Photonics for Energy, 8(3), 032202 (2018). doi:10.1117/1.JPE.8.032202
Abstract
The third- and fifth-order nonlinear optical components are extracted using z-scan under a series of irradiances for some common reference materials rhodamine B(RhB) and carbon disulfide (CS2) as well as D-A fluorophores triphenylamine-phenylaldehyde (TPA-PA) and 2diphenylamine-tetraphenylethylene-phenylaldehyde (2DPA-TPE-PA). By differentiating the third- order optical nonlinearities from high-order ones, the two-photon absorption (2PA) cross sections of RhB, TPA-PA, and 2DPA-TPE-PA estimated from z-scan are almost all consistent with those estimated from two-photon excited fluorescence, whereas the second-order refractive indices of CS2 and TPA-PA in THF solution agree with reported values in publications as well. If the z-scan curve is captured at only a single irradiance, the 2PA cross sections will probably be overestimated. As for the fifth-order optical nonlinearities, the excited-state absorption cross sections of RhB are reduced with an increase in its concentration in methanol solutions. A more comprehensive photophysical picture of the nonlinear absorption and refraction processes within these samples can be drawn from their z-scan results.
© 2018 Society of Photo-Optical Instrumentation Engineers (SPIE)
Yilin Zhang, Meijuan Jiang, Jie Li, Bin Hu, Ben Zhong Tang, Kam Sing Wong, "Z-scan study of nonlinear optical standards and D-A fluorophores considering fifth-order optical nonlinearities," Journal of Photonics for Energy 8(3), 032202 (28 March 2018). https://doi.org/10.1117/1.JPE.8.032202 Submission: Received 27 December 2017; Accepted 9 March 2018
Submission: Received 27 December 2017; Accepted 9 March 2018
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