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Effect of surface rubbing on polarization behavior and electro-optical properties of holographic polymerdispersed liquid crystals (HPDLCs)

M. BEHZADI RAD1, N. HOSAIN NATAJ1, E. MOHAJERANI1,* , H. NEMATI1

Affiliation

  1. Laser and Plasma Research Institute (LAPRI) of Shahid Beheshti University, G.C., Evin, Tehran, Iran

Abstract

Effect of surface rubbing on the polarization and electro-optical properties of holographic polymer dispersed liquid crystals (HPDLCs) was studied in details to approach to the optimal situation in different applications. The polarization-dependence of the diffracted intensities of s-and p-polarized probe beam and polarization rotation of samples were investigated. It is shown that TN sample can rotate polarization of the diffracted probe beam, rotated by 10°-20°, depending on the incident polarization. Electro-optical investigation shows that the NA and TN samples have the fastest and slowest response time in switch-on state and, inversely, slowest and fastest response time in switch-off state, respectively..

Keywords

Liquid crystal, Holographic gratings, Surface rubbing, Polarization-dependence.

Submitted at: March 16, 2010
Accepted at: July 14, 2010

Citation

M. BEHZADI RAD, N. HOSAIN NATAJ, E. MOHAJERANI, H. NEMATI, Effect of surface rubbing on polarization behavior and electro-optical properties of holographic polymerdispersed liquid crystals (HPDLCs), Journal of Optoelectronics and Advanced Materials Vol. 12, Iss. 7, pp. 1556-1561 (2010)