Polarization squeezing by optical faraday rotation

We show that it is possible to generate continuous-wave fields and pulses of polarization squeezed light by sending classical, linearly polarized laser light twice through an atomic sample which causes an optical Faraday rotation of the field polarization. We characterize the performance of the process and we show that an appreciable degree of squeezing can be obtained under realistic physical assumptions.     

A 300 GHz quasioptical faraday rotation isolator

A quasioptical isolator has been developed at 285 GHz with insertion loss2 dB and isolation 18 dB over a 1% bandwidth. By improving matching techniques, the device should perform as well over bandwidths up to 5%. This design can be easily modified to make a circulator.     

Anisotropy of the faraday rotation in orthoferrites

Faraday rotation in plates of orthoferrites, cut normally to the optical axis, depends strongly on the polarization of the incident light in the vicinity of the absorption bands, where linear dichroism is large     

Calculation of faraday rotation in an atomic gas

Formulas for calculating the spectral profile of the Faraday rotation in the vicinity of the resonance with an atomic transition in the presence of fine and hyperfine structure are presented. Some specific features of the nonresonance Faraday effect for alkali-metal atoms are considered. Translated from Trudy Fizicheskogo Instituta im. P. N. Lebedeva, Lebedev Physics Institute, Russian Academy of Sciences, Moscow, Vol. 195, pp. 234–244, 1989.     

Weak cylindrical gravitational waves

A study is made of the linearized Einstein equations without right-hand side on the background of a flat metric in cylindrical coordinates. General solutions are obtained by an expansion with respect to irreducible representations of the group of cylindrical symmetry. The solutions are investigated with allowance for additional conditions imposed on the physicogeometrical quantities, a monad choice being made of the frame of reference in the Chronometrie and kinemetric gauges.     

Anisotropic behaviour of the faraday rotation in erbium iron garnet

Faraday rotation (FR) measurements performed on single crystals Erbium Iron Garnet (ErIG) at 1.15 μm wavelength are presented in a magnetic field up to 20 kOe applied along the three main crystallographic directions. Spontaneous FR and FR susceptibilities are found to be anisotropic. The results are discussed in terms of electric and magnetic dipole transitions and compared to the magnetic anisotropy. A strong anisotropy of the first order electric dipole coefficient of the Er³⁺ ion is evidenced at low temperature (below 30 K).     

The general stationary gravitational vacuum field of cylindrical symmetry

The general stationary vacuum gravitational field of cylindrical symmetry as recently found by Davies and Caplan is even static. The possible Petrov types of the Riemann tensor areI,D orO. In spacelike infinity the spacetime becomes necessarily flat.     

Accessible solitons in three-dimensional parabolic cylindrical coordinates

A class of self-similar beams, named three-dimensional (3D) spatiotemporal parabolic accessible solitons, are introduced in the 3D highly nonlocal nonlinear media. We obtain exact solutions of the 3D spatiotemporal linear Schrödinger equation in parabolic cylindrical coordinates by using the method of separation of variables. The 3D localized structures are constructed with the help of the confluent hypergeometric Tricomi functions and the Hermite polynomials. Based on such an exact solution, we graphically display three different types of 3D beams: the Gaussian solitons, the ring necklace solitons, and the parabolic solitons, by choosing different mode parameters. We also perform direct numerical simulation to discuss the stability of local solutions. The procedure we follow provides a new method for the manipulation of spatiotemporal solitons.     

Energy and momentum of cylindrical gravitational waves

It was found manyyears ago that in cylindrical polar coordinates the energy and momentum densities of gravitational waves, calculated with the help of a pseudo-tensor, vanish. However, using cartesian coordinates, one finds them to be finite and reasonable.     

Effects of cascade capture of non-equilibrium carriers on the faraday rotation in covalent semiconductors

Faraday rotation characteristics due to non-equilibrium electrons in a covalent semiconductor are obtained under the condition when the cascade capture of the carriers is effective. It is shown that the results obtained here are useful for estimating some capture parameters.     

Observation of diverging cylindrical solitons excited with a probe

Ion acoustic solitons are excited using a large cylindrical probe enclosed in an insulator. Their speed is smaller than that of plane or converging solitons and their width increases as they travel away from the probe.