Wavelength dependence of 4-dimethylamino-4′-nitrostilbene polymer thin film photodegradation

被引：51

作者：

Zhang, Q ^{[1
]}

Canva, M ^{[1
]}

Stegeman, G ^{[1
]}

机构：

[1] Univ Cent Florida, Creol, Orlando, FL 32816 USA

来源：

APPLIED PHYSICS LETTERS | 1998年 / 73卷 / 07期

关键词：

D O I：

10.1063/1.122035

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The polymeric electro-optical stilbene material, 4-dimethylamino-4 '-nitrostilbene (DANS), was illuminated at wavelengths ranging from the visible to near-infrared in order to quantify its photodegradation processes. Photodegradation due to one-photon and two-photon absorption was studied. The quantum efficiency of the chromophore degradation is found to be strongly wavelength and absorption mechanism dependent. This suggests that, in different regions of the spectrum, different excited states or different mechanisms are involved in the degradation process. In the near-infrared spectral region, operation lifetimes of electro-optic devices made from this chromophore are expected to be around only few hundreds hours, dramatically shorter than it was previously believed. (C) 1998 American Institute of Physics.

引用

页码：912 / 914

页数：3

共 16 条

[1] THE PHOTOCHEMISTRY OF AZO-DYES - THE WAVELENGTH-DEPENDENT PHOTO-REDUCTION OF 4-DIETHYLAMINO-4'-NITROAZOBENZENE [J].