合成了一种染料反式 -4-[对 -(吡啶咯烷基 )苯乙烯基 ]-N-甲基吡啶盐碘 (PSPI). 实验研究了这种新化合物的双光子吸收 ,双光子吸收引起的频率上转换发射 ,双光子泵浦的上转换超辐射性质 . 化合物在 1064 nm处具有中等大小的双光子吸收截面σ =5.7× 10-48cm4·s/photon,但具有很高的超辐射效率 . 当泵浦能量为 2.02mJ时总的转换效率高达 16.8% .
A new dye Trans-4-[p-(pyrrolidinyl)styryl]-N-methylpyridinium iodide (PSPI) was synthesized, and the two-photon absorption (TPA), TPA-induced frequency up-conversion emission, and two-photon pumped (TPP) frequency up-converted superradiation properties of this new dye were experimentally studied. This new dye has a moderate TPA cross-section of σ 2=5.7× 10-48cm4· s/ photon at 1064 nm, but exhibits a high superradiation efficiency. The overall conversion efficiency is as high as 16.8％ at the pump energy level of 2.02mJ.
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