The near-field effect in a system of two-level dipole particles |
| |
Authors: | O N Gadomskii Yu Yu Voronov |
| |
Institution: | (1) Ul’yanovsk State University, 42 L. Tolstoi Str., 432700 Ul’yanovsk, Russia |
| |
Abstract: | We have solved a self-consistent problem on interaction of two dipole atoms located at an arbitrary distance from each other
with the field of a quasiresonance light wave, whose intensity is sufficient for the system to manifest nonlinear properties.
The atoms are considered as two-level systems described by means of Bloch optical equations, while the field inside of the
system includes both Coulomb and retarded parts. We consider a situation where atoms are identical and the distance between
them is much smaller than the length of an outer light wave. The distribution of an electric field both inside of a small
object and outside of it is found numerically. It is shown that the amplitude of the electric field in a wave zone depends
substantially on the frequency of the external field and interatomic distance, while the field distribution differs from the
field pattern of an electric dipole. At definite values of the external field intensity an optical multistability is a feature
of the system under investigation. We have elucidated the conditions under which the multistability is manifested in the present
system. The results obtained are considered as the near-field effect in the optics of small objects, which makes it possible
to investigate the structure of small objects by means of optical radiation.
Translated from Zhurnal Prikladnoi Spektroskopii, Vol. 67, No. 3, pp. 375–378, May–June, 2000.
The present work was supported by the Russian Foundation for Fundamental Research (grant 98-02-16035) and by a grant from
the Federal Purpose-Oriented Program “Integration.” |
| |
Keywords: | near-field effect Coulomb and retarded polarizing fields two-level atoms Bloch equations optical multistability light-wave field inside of a small object field in a wave zone law of dispersion |
本文献已被 SpringerLink 等数据库收录! |
|