By Igor V. Yevseyev, Valery M. Yermachenko, Vitaly V. Samartsev
During this ebook, the authors derive the speculation of elastic depolarizing collisions and describe their value in a few nonlinear electromagnetic phenomena in gaseous media. The formation of photon echo and an outline of its a variety of kinds in gaseous media are then awarded. The authors convey that the features of the corresponding signs count basically on elastic depolarizing collisions. additionally they examine some great benefits of a brand new form of photon echo spectroscopy: polarization photon echo-spectroscopy. A high-level, really good remedy, Depolarizing Collisions in Nonlinear Electrodynamics will entice researchers and complex graduates in nonlinear optics and quantum electronics.
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Extra resources for Depolarizing Collisions in Nonlinear Electrodynamics
Such an approach made it possible also to perform a theoretical analysis of numerous modifications of the photon echo in gas media. The approach developed in these papers was extended to the case of pump pulses of an arbitrary waveform , which allowed, in particular, several new effects associated with the sensitivity of the waveform of some of photon-echo modifications to the waveform of pump pulses to be predicted. 1. Note that the approach to the investigation of polarization properties of the photon echo in a gas proposed in [51, 53] was subsequently used by other authors for the solution of similar problems.
The first two pump pulses in this case still have the carrier frequency ω1 resonant to the frequency ω0 of an optically allowed transition b→a. However, in contrast to the stimulated photon echo, the third pump pulse in the modification photon echo has a carrier frequency ω2 resonant to the frequency of an optically allowed transition c→b (Ec>Eb>Ea). The modified photon echo signal is produced in a medium at the carrier frequency ω2 at the moment of time approximately equal to ω1τ1/ω2 (after the excitation of the medium by the third pump pulse, Fig.
Theoretical analysis of such modifications of the photon echo as stimulated and modified stimulated photon echo was restricted to two-level systems, ignoring the degeneracy of resonant levels. 7) within the framework of the scalar model. Thus, the approximations used to analyze the above-specified modifications of the photon echo in a gas medium were very far from reality. This issue is of special importance, because, as will be shown below, these modifications of the photon echo may provide a much richer spectroscopic information on a medium than the photon echo itself.