Study on third-order two-photon fluorescence property of DAST

Mingang Zhang; Jiahui Tang; Ruiliang Sun; Youshui Shi; Fengyao Zhang; Xiangdong Xu

doi:10.1117/12.2687450

6 August 2023 Study on third-order two-photon fluorescence property of DAST

Mingang Zhang, Jiahui Tang, Ruiliang Sun, Youshui Shi, Fengyao Zhang, Xiangdong Xu

Proceedings Volume 12781, International Conference on Optoelectronic Information and Functional Materials (OIFM 2023); 127811J (2023) https://doi.org/10.1117/12.2687450
Event: 2023 International Conference on Optoelectronic Information and Functional Materials (OIFM 2023), 2023, Guangzhou, JS, China

Abstract

With the extended π-electronic delocalization, organic 4-N, N-dimethylamino-4'-N'-methyl-stilbazolium tosylate (DAST) exhibits excellent third-order saturation absorption and optical limiting properties, but rare results about its third-order nonlinear emission have been previously reported. In this work, a flexible DAST−polyvinyl alcohol composite film was prepared, and its nonlinear emission properties were systematically characterized. Results reveal that besides a distinct second harmonic generation signal originating from the non-centrosymmetric macroscopic packing of the DAST chromophores, a strong third-order two-photon excited fluorescence signal was also measured from the composite, as experimentally confirmed by a quadratic dependence of the emission intensity on the pumped intensity. These nonlinear emission behaviors reveal that ionic organic DAST molecules hold great potential applications in laser frequency conversion and optical imaging.

Citation Download Citation

Mingang Zhang, Jiahui Tang, Ruiliang Sun, Youshui Shi, Fengyao Zhang, and Xiangdong Xu "Study on third-order two-photon fluorescence property of DAST", Proc. SPIE 12781, International Conference on Optoelectronic Information and Functional Materials (OIFM 2023), 127811J (6 August 2023); https://doi.org/10.1117/12.2687450

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