论文信息 - Photorefractive polymer-dispersed liquid crystals

Photorefractive polymer-dispersed liquid crystals

We report observation of the photorefractive effect in functionalized polymer-dispersed liquid crystals. The photoconductive properties are provided by the polymer matrix, and the field-dependent refractive-index changes are generated by the dispersed nematic liquid-crystal droplets. A high diffraction efficiency (8%) and a high refractive-index modulation amplitude Δn=2×10-3 are obtained in 53-µm-thick samples with an applied field of 22 V/µm.

[1] W. Helfrich,et al. Erratum: Conduction‐Induced Alignment of Nematic Liquid Crystals: Basic Model and Stability Considerations , 1969 .

[2] W. E. Moerner,et al. Orientationally enhanced photorefractive effect in polymers , 1994 .

[3] N. Peyghambarian,et al. A photorefractive polymer with high optical gain and diffraction efficiency near 100% , 1994, Nature.

[4] I. Khoo,et al. Observation of orientational photorefractive effects in nematic liquid crystals. , 1994, Optics letters.

[5] Michael R. Wasielewski,et al. High Photorefractive Gain in Nematic Liquid Crystals Doped with Electron Donor and Acceptor Molecules , 1995, Science.

[6] P. M. Lundquist,et al. Organic Glasses: A New Class of Photorefractive Materials , 1996, Science.

[7] Iam-Choon Khoo,et al. Orientational photorefractive effects in nematic liquid crystal films , 1996 .

[8] B. Javidi,et al. A polymeric optical pattern-recognition system for security verification , 1996, Nature.