Optical-limiting effect of polydiacetylenes substituted with heterocyclic group

Peiwang Zhu; Congxuan Yu; Jingyong Liu; Yinglin Song; Chunfei Li

doi:10.1117/12.252986

3 October 1996 Optical-limiting effect of polydiacetylenes substituted with heterocyclic group

Peiwang Zhu, Congxuan Yu, Jingyong Liu, Yinglin Song, Chunfei Li

Proceedings Volume 2897, Electro-Optic and Second Harmonic Generation Materials, Devices, and Applications; (1996) https://doi.org/10.1117/12.252986
Event: Photonics China '96, 1996, Beijing, China

Abstract

As a kind of nonlinear optical materials, polydiacetylenes (PDAs) have attracted great attention because of their large third-order susceptibilities, ultrafast responsibilities, and high damage threshold, etc. 5-(2-methylthio-4-methyl)- pyrimidinyl-2,4-pentadiyne-1-ol (PDAA) and its derivatives were synthesized. The optical limiting characteristics of these compounds were demonstrated with nanosecond and picosecond pulses at 532 nm. With linear transmittance as high as 87%, the limiting threshold and limited amplitude of PDATS(PDAA tosylate) were observed to be 200 mJ/cm² and 150 mJ/cm² respectively, which are lower than that of C₆₀ with the same high transmittance for visible light. A five-level model describing reverse saturable absorption (RSA) of PDATS was proposed to explain its optical limiting effect. The excited-state absorption cross section and the excited-state lifetime were estimated to be 4.0 multiplied by 10^-19 cm² and 0.6 microseconds respectively.

Citation Download Citation

Peiwang Zhu, Congxuan Yu, Jingyong Liu, Yinglin Song, and Chunfei Li "Optical-limiting effect of polydiacetylenes substituted with heterocyclic group", Proc. SPIE 2897, Electro-Optic and Second Harmonic Generation Materials, Devices, and Applications, (3 October 1996); https://doi.org/10.1117/12.252986

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