N. B. Baranova

Polar asymmetry of photoionization by a field with 〈E3〉 ≠ 0. Theory and experiment

Abstract We predicted and calculated the polar asymmetry of the electron angular distribution, due to the interference between one-photon ionization by a field of frequency 2ω and two-photon ionization by a field of frequency ω. The effect is observed experimentally at simultaneous illumination of a photomultiplier by picosecond Nd-laser pulses (λ = 1.06 μm) and its second harmonic radiation (λ = 0.53 μm).

Theory of a new linear magnetorefractive effect in liquids

A new linear magneto-optic effect predicted earlier by the authors is considered. The effect appears in liquids composed mainly of chiral molecules. Phenomenologically the new effect manifests itself as a change in the refractive index, which is proportional to the scalar product (B . k), where k is the photon wave vector, and B, the external quasi-static magnetic field. The constant of the new effect has been calculated. The expression obtained contains matrix elements of electric and magnetic dipoles and electric quadrupoles taken between electronic wave-functions of the molecule. A simple interpretation of the mechanism for the new effect is given. The cascade mechanism for a contribution of the first order terms to the observable constants of the second order effects is treated. In particular, the corrections to magnetostriction and Cotton-Mouton constants due to the Faraday effect are determined. It is shown that the cascade mechanism does not contribute to the observable value of the new magnetorefr...

Electrical analog of the Faraday effect and other new optical effects in liquids

Abstract A number of new optical effects in liquids is considered, including the electrical analog of the Faraday effect etc. Some of the new effects may appear only in liquids consisting of right-left-nonsymmetrical molecules and some in electrically conductive liquids only. The mechanisms of related processes are discussed and estimations of the corresponding constants are given. Most of the predicted new effects may be registered with the use of modulation of external electrical and magnetic fields and synchronous detection of the signal.

Separation of mirror isomeric molecules by radio-frequency electric field of rotating polarization

Abstract We predict the effect of separation of mirror isomeric molecules into right and left fractions from a racemic liquid solution under the action of a radio-frequency electric field of rotating polarization. An approximate calculation of the dependence of the separation rate on the field frequency is given. Numerical estimations show the possibility of experimental observation of the effect.

Distortionless Propagation of Ordinary Wave through Inhomogeneous Nematic (Theory and Experiment)

Abstract We predicted and confirmed experimentally that an ordinary wave may propagate through a very thick (∼5 mm) nematic liquid crystal (NLC) cell almost without distortions. The physical idea is that: 1) the polarizations of the e-and o-wave follow adiabatically the local orientation of optical axis and 2) phase velocity of o-wave does not depend on orientation. Behavior of polarization around disclination line is studied.

On the expansion of radiation intensity into (a/γ) power series in electrodynamics

Abstract An expression for the radiation intensity of a nonrelativistic system of charges integrated over all angles is obtained as a series of powers of small parameter (a/γ) up to the terms ∼(a/γ)2 inclusive. It differs by a new term ∼(a/γ)2. Besides other reasons, the inclusion of that new term restores the invariance relative to the small (∼a) displacement of the coordinate system origin which was violated by an earlier expression.