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Issue 34, 2020, Issue in Progress
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Anthracene derivatives as broadband nonlinear optical materials: nonlinear absorption and excited-state dynamics analysis

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Abstract

Two anthracene derivatives, AN-1 and AN-2, with different π-bridge lengths were designed and synthesized to investigate their optical nonlinearities. The nonlinear absorption (NLA) properties of both derivatives were measured via the femtosecond Z-scan technique with the wavelength range from 532 nm to 800 nm. The reverse saturable absorption (RSA) of both compounds results from two-photon absorption induced excited-state absorption (TPA-ESA). At all wavelengths, the reverse saturable absorption of AN-2 is superior to that of AN-1 due to a better molecular planarity for AN-2. Compared with the results of AN-1, the two-photon absorption coefficient of AN-2 can be increased by nearly 8 times (from 0.182 × 10−2 cm GW−1 for AN-1 to 1.42 × 10−2 cm GW−1 for AN-2) at 600 nm by extending the π-bridge. The evolution of femtosecond transient absorption (TA) spectra reveals the relaxation process from the singlet local excited-state (LES) to charge transfer state (CTS) for both compounds. The results imply that anthracene derivatives may be potential candidates for applications in future laser photonics.

Graphical abstract: Anthracene derivatives as broadband nonlinear optical materials: nonlinear absorption and excited-state dynamics analysis

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Supplementary files

Article information


Submitted
22 Mar 2020
Accepted
18 May 2020
First published
27 May 2020

This article is Open Access

RSC Adv., 2020,10, 19974-19981
Article type
Paper

Anthracene derivatives as broadband nonlinear optical materials: nonlinear absorption and excited-state dynamics analysis

W. Zhou, Y. Fang, X. Wu, Y. Han, J. Yang, L. Shen and Y. Song, RSC Adv., 2020, 10, 19974
DOI: 10.1039/D0RA02638G

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