测量了螺吡喃1＇,3＇,3＇-trimethylindolino-6-nitrospirobenzopyran(6-nitroBIPS)掺杂聚苯乙烯薄膜在紫外光抽运前后的吸收光谱,利用其吸收光谱的显著改变,对590 nm探测光的全光调制特性进行了研究.对调制随染料掺杂浓度和紫外光激发能量的依赖性进行了测量,理论模拟得出其光化学反应量子效率为0.24和螺吡喃光化学产物光半花菁在590 nm处的摩尔吸收系数为2.0×104 Lmol-1cm-1.被调制信号的前沿和后沿时间常数分别约为131 ns和18 μs.

The absorption spectra of spirobenzopyran 6-nitroBIPS doped polystyrene thin film with and without UV irradiation were measured. All-optical modulation of 590 nm probe light utilizing the alteration of the absorption of the thin film was studied. The dependence of the optical modulation on the concentration of the dye doped and the intensity of the excitation UV light was also studied. The photochemical quantum yield is 0.24 and the molar absorption coefficient at 590 nm of the photoproduct is 2.0×10 4 Lmol -1 cm -1 according to the theoretical fitting. The time constants of the front line and the after-edge of the modulated light signal were about 131 ns and 18 μs, respectively.