نتایج جستجو برای: dipole

تعداد نتایج: 23536  

آذریان, عباس, رنجبر, سعید,

In this paper, we investigate optical properties of silver pyramid nanostructures (SPNs) by means of discrete dipole approximation (DDA), when these nanoparticles are embedded into the water. Absorption, scattering and extinction cross-sections of the SPNs were calculated by change of incident wavelength in visible and near infra-red region. Moreover, height, wavelength and full width at half m...

In this paper Kolomogorov entropy of a simulated cavity quantum electrodynamics in a multi-partite system consisting of eight quantum dots in interaction with one cavity mode has been estimated. It has been shown that the Kolmogorov Entropy monotonically increases with the increasing coupling strength, which is a sufficient condition for chaotic behavior under ultrastrong coupling regime. The a...

2007
L. I. Titomir V. G. Trunov

There are presented results of experimental-laboratory testing a new method to diagnose the right ventricular hypertrophy. The method is based upon the dipole electrocardiotopography (DECARTO) technique, proposed formerly by the authors and successfully applied for recognition of the left ventricular hypertrophy. The results obtained on reliably verified groups of normal and diseased persons sh...

2012
Michael Kahnert Timo Nousiainen Manu Anna Thomas Jani Tyynelä

We compare four different model geometries for particles with small-scale surface roughness. The geometries are based on regular and stochastic surface perturbations, as well as on 2Dand 3D-roughness models. We further compare T-matrix and discrete dipole computations. Particle size parameters of 5 and 50 are considered, as well as refractive indices of 1.6+0.0005i and 3+0.1i. The effect of sma...

2002
Pavel M. Lushnikov

Bose-Einstein condensation of dilute trapped atomic gases @1,2# essentially depends on the interparticle interactions. In most experiments so far the dominated interactions have been short-range van der Waals forces which are characterized by the s-wave scattering length a. Spatially homogeneous condensates with positive scattering length ~repulsive interaction! are stable while condensates wit...

2005
Juan Ortigoso Julio Santos

A robust and versatile method is demonstrated to maintain, for an arbitrary time, quasiconstant and strong orientation for molecules with minute dipole moments. The procedure is based on submitting molecules in cyclic wave packets to periodic trains of nonresonant pulses in an electrostatic field. We show that approximate cyclic states can be created by suddenly switching off a long laser pulse...

2000
T. K. Sarkar J. V. Tejedor T. M. Wang A. Cuevas B. W. Kim Y. C. Chung

This paper introduces a novel variation of the vee dipole antenna consisting of two coplanar vee dipoles with a common feed point. It is referred to as a double-vee dipole. Radiation characteristics of the double-vee dipole antenna are investigated numerically and experimentally. It is shown that the double-vee dipole can provide significantly higher directivity and lower sidelobes and back rad...

2003
C. Skornia H. Walther

The emission characteristics in the fluorescence of two laserdriven dipole-dipole-interacting three level atoms is investigated. When the light from both atoms is detected separately a correlation of the emission processes is observed in dependence of the dipole-dipole interaction. This opens the possibility to investigate the dipole-dipole interaction through the emission behavior. We present ...

Journal: :Journal of Physics B: Atomic, Molecular and Optical Physics 2007

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