Extended Cylindrical Low-Pressure Arc Discharge Plasma Emitter for Generation of a Radially Diverging Electron Beam

Russian Physics Journal - The paper presents the results of studies of processes of generation of a beam-plasma formation in an extended cylindrical hollow mesh anode with a diameter of 115 mm and...     

Characterization of vibrational resonances of water-vapor interfaces by phase-sensitive sum-frequency spectroscopy

Phase-sensitive sum-frequency spectroscopy provides correct characterization of vibrational resonances of water-vapor interfaces and allows better identification of interfacial water species contributing to different parts of the spectra. Iodine ions emerging at an interface create a surface field that tends to reorient the more loosely bonded water molecules below the topmost layer.     

Pulsed Non-Self-Sustained Arc Discharge in Extended Hollow Anode

Russian Physics Journal - The paper investigates physical properties of a pulsed arc discharge of low (≈1 Pa) pressure created in argon by a plasma source with the thermionic and hollow...     

New information on water interfacial structure revealed by phase-sensitive surface spectroscopy

A phase-sensitive sum-frequency vibrational spectroscopic technique is developed to study interfacial water structure of water/quartz interfaces. Measurements allow deduction of both real and imaginary parts of the surface nonlinear spectral response, revealing an unprecedentedly detailed picture of the net polar orientations of the water species at the interface. The orientations of the icelike and liquidlike species appear to respond very differently to the bulk pH change indicating the existence of different surface sites on quartz with different deprotonation pK values.     

Generation of Homogeneous Gas-Discharge Beam-Plasma Formations in an Extended Hollow-Cathode of a High-Current Glow Discharge

Russian Physics Journal - Regular features of the generation of gas-discharge beam-plasma formations formed in a high-current non-self-sustained glow discharge at low (≈1 Pa) pressure in an...     

Influence of the Anode of a Non-Self-Sustained Glow Discharge with a Hollow Cathode on the Spatial Distribution of Plasma Concentration

Russian Physics Journal - The results of investigation of the influence of geometrical dimensions, shape and position of the anode of a high-current non-self-sustained glow discharge with a hollow...     

Generation of Plasma with Increased Ionization Degree in a Pulsed High-Current Low-Pressure Hollow Cathode Discharge

Russian Physics Journal - The paper presents the results of research of the processes of generation of pulsed beam-plasma formations in a high-current non-self-sustained glow discharge with a...     

Electrically controlled surface diffraction gratings in nematic liquid crystals

Photorefractive diffraction gratings were studied in cells of homeotropically aligned pentyl-cyanobiphenyl liquid crystal. These holographic gratings were induced by the simultaneous and nonsimultaneous application of dc and coherent optical electric fields. The observed behavior was consistent with a predominantly surface-mediated photorefractive effect. Beam coupling was observed in all cases and led to a model involving screened and unscreened interfacial trapped charges driving a modulation of the easy axis. Holographic gratings could be switched on and off by the application of a small voltage.     

Deposition of a Multilayer Coating in a Gas-Metal Beam-Plasma Formation at Low Pressure

Russian Physics Journal - The vacuum-arc plasma-assisted method is used to deposit a multilayer coating based on Ti and Al in two discharge systems – in a traditional plasma-assisted...     

Nonpolar second‐order nonlinear and electrooptic materials: Axially ordered chiral polymers and liquid crystals

This article reviews our work on the development and optimization of chiral, nonpolar media with large second‐order nonlinear optical responses. We show how molecular engineering, theory, and measurements can be used to optimize this promising class of nonlinear optical materials. We describe how supramolecular alignment into easily processable materials takes advantage of the relevant molecular hyperpolarizabilities. A wide variety of techniques can be used to fabricate bulk materials belonging to the chiral nonpolar symmetry groups, D_∞ and D₂. The microscopic chromophore alignment schemes that optimize the nonlinear optical response in such materials are deduced from general symmetry considerations for both molecules and bulk. We also speculate on the possible applications of such materials as image‐plane modulators. © 2003 Wiley Periodicals, Inc. J Polym Sci Part B: Polym Phys 41: 2744–2754, 2003