ELECTRIC-FIELD STABILIZATION AND COMPETITION OF GRATINGS IN A PHOTOREFRACTIVE POLYMER

被引：26

作者：

DUCHARME, S ^{[1
]}

JONES, B ^{[1
]}

TAKACS, JM ^{[1
]}

LEI, Z ^{[1
]}

机构：

[1] UNIV NEBRASKA,CTR MAT RES & ANAL,DEPT CHEM,LINCOLN,NE 68588

来源：

OPTICS LETTERS | 1993年 / 18卷 / 02期

关键词：

D O I：

10.1364/OL.18.000152

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We report observations of electric-field stabilization of gratings and grating competition in a new photorefractive polymer mixture composed of 40 wt. % diethylamino-benzaldehyde-diphenyl hydrazone dissolved in Bisphenol A 4,4'-nitroaminotolane. Gratings formed with a 650-nm optical wavelength in 145-mum-thick films at 138-kV/cm bias field have a diffraction efficiency as high as 0.11%, require an energy density of approximately 1 J/cm2 for formation, and show cancellation, revelation, and electric-field-stabilized persistence. We propose a model in which fast recording is associated with one set of photosensitive traps, whereas a slower cancellation and subsequent revelation are associated with a competing grating formed in a set of insensitive shallow traps. The model also accounts for observed fatigue of the photoconductivity.

引用

页码：152 / 154

页数：3

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