一种新型有机染料HEASPS在不同波长时的双光子吸收和频率上转换性质研究

Study on the two-photon absorption and frequency upconversion properties of a new organic dye HEASPS

报道了一种新型双光子吸收染料 ,即反式 - 4- [4′- (N-羟乙基 - N-乙基胺基 )苯乙烯基 ]- N-甲基吡啶对甲苯磺酸盐的非线性光学性质 ;测试了染料在 72 0～ 110 0 nm波段的非线性透过率曲线。结果发现 :双光子吸收最强波长相对线性吸收峰波长的两倍处有明显蓝移 ;计算出的相应波长的双光子吸收截面在 930 nm处染料有最大双光子吸收截面(2 .0 6× 10 - 4 7cm4·s/ photon) ;测量了染料在 90 0～ 110 0 nm波段的上转换效率 ,在 10 2 0 nm处有最高效率 (5 .1% ) 。

The nonlinear optical properties of a newly synthesized two-photon absorption (TPA) dye trans-4-[4'-(N-hydroxyethyl-N-ethylamino) styryl]-N-methylpyridinium p-toluene sulfonate are reported. The nonlinear transmittance spectrum from 720 nm to 1100 nm is measured. There is a 44 nm blue shift for the wavelength of the transmittance peak compared with two times of the wavelength of the linear absorption peak. The molecular TPA cross-section at 720-1100 nm wavelength is measured and the largest σ'2 is 2.06×10-47cm4&middots/photon. The upconversion efficiency from 910 nm to 1100 nm is measured and the highest efficiency is 5.1% at 1020 nm. There is a 90 nm red shift for the wavelength of the highest efficiency compared with the wavelength of the TPA peak.