Investigations on the nature of both linear and nonlinear electrooptic eeects in columnar mesophases of chiral discotic dibenzopy-rene and triphenylene derivatives and their mixtures are presented. We specially focus on the innuence of chirality on the switching process. INTRODUCTION Ferroelectricity in tilted smectic phases of chiral molecules was predicted to occur by R. B. Meyer et al. in 19...

We study theoretically the effect of an electric field on the electron states and far-infrared optical properties in narrow-gap lead salt quantum wells. The electron states are described by a two-band Hamiltonian. An application of a strong electric field across the well allows the control of the energy gap between the two-dimensional (2D) states in a wide range. A sufficiently strong electric ...

This thesis presents a comprehensive study of the role of the fiber replicator in electrooptical systems. In the all fiber optical diagnostic system for the National Ignition Facility‟s DANTE data acquisition system running at 1550nm, the 8× fiber replicator was used to increase the SNR (Signal to Noise Ratio) of single-shot, electrical pulse measurements. In the system, Mach-Zehnder modulators...

A new class of liquid electro-optics based on electrowetting is able to replicate the high performance of solid geometrical optics. Scaled-down electrowetting optics can be arrayed in order to achieve a flat and large area form factor. Techniques for applying electrowetting devices to light valves and arrayed microprisms are reviewed. Electrowetting light valves (ELVs) reconfigure the geometry ...

* Address for correspondence: PL-84200 Wejherowo, ul. Gen. W. Sikorskiego 11, Poland. the increments in the dipole moments, A/J, determined for different fluorescent molecules, based on the LippertMataga solvent polarity parameter are much overrated in comparison to the values /ue obtained by electrooptical methods [7-10], In the present paper we determine the dipole moments ,ug and yue of P R ...