High-resolution two-photon spectroscopy of atoms and molecules (A)

Bernard Cagnac

Y. Kato, Boris Peter Stoicheff

R. Beigand, Andre Timmermann

M. P. McCann, C. H. Chen, Marvin G. Payne

M. M. Salour

Interaction of atoms with two intense coherent time-delayed short pulsed standing waves produces quantum interference effects in the atomic fluorescence. This type of quantum interference effect applied to Doppler-free two-photon spectroscopy (an extension of the Ramsey method of separated r.f. or microwave fields in atomic beam experiments) offers a number of important improvements in the presently available techniques of ultra-high-resolution spectroscopy of atoms, molecules, and crystals.

S. N. Andrianov, Yu. E. Pol’skii

This paper proposes a new form of nonsteady-state anti-Stokes near-field spectroscopy with high spatial resolution in Dicke's optical superradiation regime. A system of kinetic equations is constructed that describes collections of excited atoms and fluorescence photons in the far field. It is solved approximately, and a formula is obtained for the signal intensity of nonsteady-state anti-Stokes near-field spectroscopy. Possible ways of constructing a new method of high-spatial-resolution spectroscopy of atoms and molecules are discussed.