Accession Number : ADA188365

Title :   Correlations between Photons in Resonance Fluorescence Emitted by an Atom Near a Metal Surface.

Descriptive Note : Technical rept.,

Corporate Author : STATE UNIV OF NEW YORK AT BUFFALO DEPT OF CHEMISTRY

Personal Author(s) : Arnoldus, Henk F ; George, Thomas F

PDF Url : ADA188365

Report Date : Oct 1987

Pagination or Media Count : 40

Abstract : The photon correlations of resonance fluorescence emitted by a degenerate two-level atom near a metal surface are studied. An intense non monochromatic optical laser drives a low lying atomic transition, and the emitted fluorescence is detected by a photon counter. An expression for the spontaneous decay operator is derived, and it appears that the various substates of the upper level have a different lifetime due to the presence of the surface, or equivalently, due to the loss of spherical symmetry. The temporal photon correlation function is then evaluated in terms of a photon-emission operator and the time evolution operator for the atomic density matrix. The general theory is exemplified with a detailed elaboration of the j sub g = 0 yields j sub e = 1 transition, for which the two-photon correlation is obtained explicitly as a function of the lifetime A(h), depending on the atom surface distance h, the laser linewidth, the detuning from resonance, and the dipole-coupling strength with the external field. Keywords: Photon correlations; Resonance fluorescence; Atom near metal surface; Loss of spherical symmetry; Substates; Different lifetimes.

Descriptors :   *FLUORESCENCE, *RESONANCE RADIATION, *PHOTOCHEMICAL REACTIONS, *SURFACE CHEMISTRY, ATOMS, CORRELATION, DECAY, ELECTRON TRANSITIONS, EVOLUTION(GENERAL), METALS, OPERATORS(PERSONNEL), PHOTONS, RANGE(DISTANCE), SPECTRAL LINES, SURFACES, TIME, LASER PUMPING, LASER BEAMS

Subject Categories : Radiation and Nuclear Chemistry

Distribution Statement : APPROVED FOR PUBLIC RELEASE