Polarization holographic gratings in side-chain azobenzene polyesters with linear and circular photoanisotropy.

Diffraction from Polarization Holographic Gratings with Surface Relief in Side-chain Azobenzene Polyesters

We investigate the polarization properties of holographic gratings in side-chain azobenzene polyesters in which an anisotropic grating that is due to photoinduced linear and circular birefringence is recorded in the volume of the material and a relief grating appears on the surface. A theoretical model is proposed to explain the experimental results, making it possible to understand the influen...

Azobenzene Side-Chain Liquid Crystalline Polyesters with Outstanding Optical Storage Properties

A flexible azobenzene side-chain liquid crystalline (SCLC) polyester architecture employed for reversible optical storage is described. The modular design allows four structural parameters to be individually modified. These parameters: ithe methylene side-chain spacer length, iithe substituent on azobenzene, iiithe methylene main-chain segment length, and ivthe polyester molecular mass, all inf...

High diffraction efficiency polarization gratings recorded by biphotonic holography in an azobenzene liquid crystalline polyester

Self - organizing photorefractive neural network

The three dimensional display of images of moving objects has been a dream for many decades. Ranging from a study of microscopic objects, such as cells, in their natural environment to three dimensional movies, this dream has been realized under certain circumstances. Short recordings of moving objects have been made holo-graphically in silver halide films. But apart from limited sensitivity, t...

Polarization Holographic Device Using Photoreactive Polymer Liquid Crystals

Optical phase gratings were fabricated from photo-crosslinkable polymer liquid crystals with mesogenic 4-(4-methoxycinnamoyloxy)biphenyl side groups by irradiating with 325 nm interference lights and subsequent annealing at elevated temperatures. Recorded phase gratings were verified after the annealing process, although no gratings were observed immediately after the exposure. The characterist...