Resonance Scattering Of Radiation By Interacting Atoms.

А. Н. Ораевский

В. В. Климов, Vladilen S Letokhov

This paper deals with the scattering of radiation by resonant nanostructures, i.e., systems of like atoms arranged at distances much less than the wavelength of light. It is demonstrated that the quasistatic interaction of atoms in such nanostructures changes the eigenfrequency structure of the atoms forming the nanostructure and causes substantial alterations in the scattered light spectrum. With the plane polarization of the incident light wave, the spectrum can be singlet (two interacting atoms), doublet (three interacting atoms), and so on, depending on the number of atoms in the nanostructure. The potential possibility is discussed of using such resonant structures as ultrahigh-density ROM devices.

M.V. Kazarnovski, Alexander V. Stepanov

Mikhail Vladimirovich Fedorov, MA Efremov, VP Yakovlev +1 more

The scattering of atoms by a resonance standing light wave is considered under conditions when the lower of two resonance levels is metastable, while the upper level rapidly decays due to mainly spontaneous radiative transitions to the nonresonance levels of an atom. The diffraction scattering regime is studied, when the Rabi frequency is sufficiently high and many diffraction maxima are formed due to scattering. The dynamics of spontaneous radiation of an atom is investigated. It is shown that scattering slows down substantially the radiative decay of the atom. The regions and characteristics of the power and exponential decay are determined. The adiabatic and nonadiabatic scattering regimes are studied. It is shown that the wave packets of atoms in the metastable and resonance excited states narrow down during scattering. A limiting (minimal) size of the wave packets is found, which is achieved upon nonadiabatic scattering in the case of a sufficiently long interaction time.

John Wolfgang Czarnik, Peter R. Fontana

The frequency distribution of resonant radiation emitted by a system of two identical interacting atoms is calculated. The separation between the atoms is assumed to be much larger than the size of their charge distributions. Initially one atom is excited while the second one is in the ground state. The two atoms are coupled through the radiation field and the electrostatic interaction. For not too large internuclear separations the line shape of the emitted radiation exhibits two distinct peaks, and the general features are identical with the result obtained from resonance fluorescence scattering. In the decay process, however, there is equal probability of scattering through the symmetric and antisymmetric states, and thus the peak heights of the emitted radiation are different from the ones in the resonance fluorescent case. For large internuclear separations the two peaks merge into the one characteristic of the line shape of a single isolated atom.

J. P. Toennies