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.

Report Date:

1987-10-01

Pagination or Media Count:

40.0

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 Ah, 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