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Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE

Echo-spectroscopy of dense Yb vapors

Oleg Kh Khasanov, Русецкий Григорий Александрович, Н. Н. Рубцова, В. Н. Ищенко, Хворостов Евгений Борисович

Published Mar 3, 2006• 0 citations
Publisher

Abstract

The near dipole-dipole interatomic interaction effect on transients in dense Yb vapors is considered. The influence of excitation-induced-dephasing as well as the frequency shift on signals of nonstationary nutation, free polarization decay and photon echo are taken into account. The conditions of intrinsic optical bistability occurrence in dense resonant media are discussed. The local field is shown to result in multiple single-pulse echo signals. Besides, in such media one can observe a lot of primary photon echo responses under various phase-matching conditions.

DOI
10.1117/12.675021

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The near dipole-dipole interatomic interaction effect on transients in dense Yb vapors is considered. The influence of excitation-induced-dephasing as well as the frequency shift on signals of nonstationary nutation, free polarization decay and photon echo are taken into account. The conditions of intrinsic optical bistability occurrence in dense resonant media are discussed. The local field is shown to result in multiple single-pulse echo signals. Besides, in such media one can observe a lot of primary photon echo responses under various phase-matching conditions.
The effect that may be exerted by an interatomic near dipole-dipole interaction upon optical transient processes in dense resonance media is analyzed. The behavior of the macroscopic polarization after a one-pulse excitation of a dense ensemble of two-level atoms is considered. It is shown that the free polarization signal is of oscillatory nature, with the oscillation frequency varying in time and being dependent on the dipole-dipole interaction constant, the intensity and duration of the exciting pulse, and the detuning of its carrier frequency from the resonance. The free polarization signal decay, which depends on the magnitude and sign of the sum of the detuning of the exciting pulse carrier frequency from the resonance and the Lorentz frequency, may obey either a power or an exponential law. The signal decay rate is determined not only by the inhomogeneous broadening, but also by the ratio of the above parameters. The peculiarities of echo-responses under one- or two-pulse excitation conditions are studied.
The effect that may be exerted by an interatomic dipole-dipole interaction upon optical transient processes in dense resonance media, in particular, free polarization decay, is analyzed. The behavior of the macroscopic polarization after a single-pulse excitation of a dense ensemble of two-level atoms is considered. It is shown that the free polarization signal is of oscillatory nature, with the oscillation frequency varying in time and being dependent on the dipole-dipole interaction constant, the intensity and duration of the exciting pulse, and the detuning of its carrier frequency from the resonance. The free polarization signal decay, which depends on the magnitude and sign of the sum of the detuning of the exciting pulse carrier frequency from the resonance and the Lorentz frequency, may obey either a power or an exponential law. The signal decay rate is determined not only by the inhomogeneous broadening, but also by the ratio of the above parameters.