Abstract
Ultrafast optical nonlinearities of N,N-dimethylformamide (DMF) are studied by using polarized light at 400 nm. Both nonlinear refraction (NLR) and stimulated Rayleigh-wing scattering (SRWS) depend on the polarization state of incident beam, while two-photon absorption (TPA) changes negligibly with polarization state. The polarization dependence of SRWS originates from that of NLR via self-focusing effect. Third-order susceptibility elements of DMF were determined, and a method to distinguish the multi-photon absorption signal from SRWS in Z-scan is provided. These results are helpful for the nonlinear optical research of the novel materials dissolved in DMF.
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This work has been supported by the National Natural Science Foundation of China (No.12074202), and the Natural Science Foundation of Tianjin City (Nos.22JCYBJC00390 and 20JCQNJC00020).
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Zhao, X., Xue, Z., Liu, Q. et al. Polarization-dependent ultrafast optical nonlinearities of N,N-dimethylformamide at 400 nm. Optoelectron. Lett. 19, 541–547 (2023). https://doi.org/10.1007/s11801-023-3081-2
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DOI: https://doi.org/10.1007/s11801-023-3081-2