Correlation between Dispersivity of Charge Transport and Holographic Response Time in an Organic Photorefractive Glass
Correlation between Dispersivity of Charge Transport and Holographic Response Time in an Organic Photorefractive Glass
复制标题
有机光折变玻璃中电荷传输色散率与全息响应时间的相关性
DOI：
10.1021/jp9935283
复制
发表时间：
2000
影响因子：
3.3
通讯作者：
Stephan J. Zilker
中科院分区：
文献类型：
--
作者：
U. Hofmann;M. Grasruck;A. Leopold;A. Schreiber;S. Schloter;C. Hohle;P. Strohriegl;and D. Haarer;Stephan J. Zilker
我们报道了一种基于低摩尔质量玻璃的有机光折变材料的光电和全息研究。通过实施合适的增塑剂，我们得到了一个复合系统，在写入光束强度为10.8W/cm~2时，S的初始响应时间降至450μ，在规范强度为1W/cm~2时，初始响应时间为2.5ms。此外，还观察到了高达Δn=6.1×10-3的高折射率调制，长寿命和高光学质量。与第二个类似的复合体系相比，我们证明了这种功能组分对光电性能的关键作用。飞行时间测量表明，增塑剂对电荷-载流子传输的分散性有很大影响。随后，光折变光栅的建立和衰减动力学受到很大影响。全息飞行时间测量。
We report on photoelectric and holographic investigations of an organic photorefractive material based on a low molar mass glass with both photoconductive and nonlinear optical properties. By implementing a suitable plasticizer we obtained a composite system which shows extremely fast initial response times down to 450 μs at writing beam intensities of Iwrite = 10.8 W/cm2 and 2.5 ms at the canonical intensity of Iwrite = 1 W/cm2. Furthermore, high refractive index modulations up to Δn = 6.1 × 10-3, long lifetimes and high optical quality of the samples are observed. In comparison to a second similar composite system, which was plasticized by a more polar dopand, we demonstrate the crucial role of this functional constituent on the photoelectric properties. Time-of-flight measurements show a major impact of the plasticizer on the dispersivity of charge-carrier transport. Subsequently the buildup and decay dynamics of the photorefractive grating are substantially affected. Holographic time-of-flight measure...