Optical data storage in LC cells

Abstract

Liquid crystal devices as a medium for holograms storage have been investigated. Long term memory effects in LC cells have been observed. Experiments proved that certain combination of insulating alignment layers has a major influence on the long term memory effect. Optimal liquid crystal cell construction allows us to achieve sufficient diffraction efficiency to record holographic patterns and to develop a re-writable holographic medium. The configuration of PVK and polyimide layers in LC cell construction with specific LC mixture was tested. The method of permanent and re-writable recording of optical data (holographic pattern) onto LC cells was achieved. However, the method of erasing recorded data was realized but mechanisms of this phenomenon are not clearly understood yet.

Holographic Recordings Using Bistable SmC* Structures

“…In the experiment the power of the first diffraction order was measured and the number of diffraction order was noticed. [16,17].…”

Electromagnetic Formalisms for Optical Propagation in Three-Dimensional Periodic Liquid-Crystal Microstructures

“…Nanoscale structures have achieved novel functions in liquid crystal devices such as liquid crystal displays, optical filters, optical modulators, phase conjugated systems, optical attenuators, beam amplifiers, tunable lasers, holographic data storage and even as parts for optical logic systems over the last decades (Blinov et al (2006;2007); Sutkowski et al (2006)). Many theoretical works also have been reported on liquid crystal (LC) optics.…”

An Algorithm to Study of the Influence of Partial-Coherent Lights through Three-Dimensional Periodic Microstructures

“…Nanoscale structures have achieved novel functions in electro-optic devices such as optical filters, optical modulators, phase conjugated systems, optical attenuators, beam amplifiers, tunable lasers, holographic data storage and even as parts for optical logic systems [1][2][3][4][5][6][7][8][9][10][11][12][13][14] over the last few decades. In contrast to the assumption of the ideal coherent (plane-wave) light in most theoretical studies [15][16][17][18][19][20][21], the associated decoherence characteristics and intensity distribution of the light, e.g.…”