论文信息 - Non-Electric Field Photorefractive Effect Using Polymer Composites

Non-Electric Field Photorefractive Effect Using Polymer Composites

We prepared photorefractive composites using poly(3,4-ethylenedioxythiophene)-block-polyethylene glycol (PEDOT-block-PEG) as a key material doped with nonlinear optical chromophore ((S)-(-)-l-(4-Nitrophenyl)-2-pyrrolidinemethanol (NPP). To adjust the optical absorbancc PMMA was used as a matrix. Photorefractive properties were characterized by means of a two beam coupling (2BC) method and a degenerated four wave mixing (DFWM) method. We successfully observed asymmetric 2BC under non-electric field: Photorefractive characteristics obtained are a net 2BC gain of 175 cm−1, a diffraction efficiency of 49%, and a phase shift of 90°. Furthermore, we could demonstrate its high performance by DFWM image processing experiment.

[1] Naoto Tsutsumi,et al. Asymmetric Two-Beam Coupling with High Optical Gain and High Beam Diffraction in External-Electric-Field-Free Polymer Composites , 2004 .

[2] P. Yeh,et al. Introduction to photorefractive nonlinear optics , 1993 .

[3] Pavel Cheben,et al. A photorefractive organically modified silica glass with high optical gain , 2000, Nature.

[4] Jung-Ki Park,et al. Novel Polymer Composites with High Optical Gain Based on Pseudo‐Photorefraction , 2002 .

[5] W. E. Moerner,et al. POLYMERIC PHOTOREFRACTIVE MATERIALS , 1994 .

[6] Scott,et al. Observation of the photorefractive effect in a polymer. , 1991, Physical review letters.

[7] A. Jen,et al. Design and synthesis of chromophores and polymers for electro-optic and photorefractive applications , 1997, Nature.