螺吡喃6-nitroBIPS掺杂聚苯乙烯膜的全光调制特性研究  

Properties of All-optical Modulation with Spirobenzopyran 6-nitroBIPS Doped Polystyrene Film

作　　者：黄金荣[1] 沈宏[1] 刘建华[1] 

机构地区：[1]复旦大学光科学与工程系,上海200433

出　　处：《中国激光》2002年第12期1105-1109,共5页Chinese Journal of Lasers

基　　金：国家自然科学基金 (青年 )资助项目 (项目合同号 :1980 40 0 3)

摘　　要：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 5 90nm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 2 4和螺吡喃光化学产物光半花菁在 5 90nm处的摩尔吸收系数为 2 0× 10 4Lmol- 1 cm- 1 。被调制信号的前沿和后沿时间常数分别约为 131ns和 18μs。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 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 photochemical product is 2.0×104 Lmol-1cm-1 according to the theoretical fitting. The time constants of the front line and the after-edge of the modulated light signal are about 131 ns and 18 μm, respectively.

关 键 词：螺吡喃 光致变色 吸收光谱 全光调制 

分 类 号：O484.41[理学—固体物理]