Saturation effect in azobenzene polymers used for polarization holography

Computer generated polarization holograms with defined magnitude and orientation of each pixel’s birefringence

“…The corresponding diffracted field is the left-circular component as described by the first term on the rhs of eq (2). The other is a phase hologram with 2ρ as the phase modulation.…”

“…Polarization holograms have been used for a number of applications, including the manipulation of vortex fields [1], optical data storage [2], polarization measurements [3] or to realize diffractive optics [4,5]. So far computer generated polarization holograms were only fabricated with space-variant orientation of birefringence, but constant magnitude of the retardance [1,3,4,5].…”

Optical encryption and encrypted holographic storage using phase-only data pages

“…We have developed a FFT based simulation program 11,12 to model phase to amplitude conversion and optical encrypted holographic storage. We investigate the basic properties of the holographic recording with phase object and the phase to amplitude conversion and carried out a simulation of the object space encoding and double random phase coding that introduces phase modulation both into the Fourier plane and the image plane (see system diagram in Figure 2:).…”

The kinetics of the E-Z-E isomerisation and liquid-crystalline properties of selected azobenzene derivatives investigated by the prism of the ester group inversion

“…Because of the above-described optical properties, the azobenzene derivatives can be applied in many branches of modern technologies. [8][9][10][11][12] The azobenzene compounds are very interesting materials because of their photosensitivity but also due to rich liquid-crystalline polymorphism. Such type of molecules with azo moiety are well known in literature since the 1930s, [13][14][15] when the enhanced development of the mesogens studies was intensified.…”