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

Photon echo generated in thin-film cavity structures

Valeriy A. Goryachev, Sergey M. Zakharov, Eduard A. Manykin

Published May 30, 2002• 0 citations
Publisher

Abstract

The transmission of sequence with ultrashort light pulses through the resonant cavity structure are considered. The features of the Photon Echoes effect are researched. It is shown that the dynamic efficiency in a holographic formation of nonstationary images can substantially exceed the analogous quantity in the case of bulk excitation of the resonant medium.

DOI
10.1117/12.468939

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The transmission of sequence with ultrashort light pulses through the resonant cavity structure are considered. The features of the Photon Echoes effect are researched. It is shown that the dynamic efficiency in a holographic formation of nonstationary images can substantially exceed the analogous quantity in the case of bulk excitation of the resonant medium.
A theory of coherent interaction between a sequence of ultrashort laser pulses and planar, thin-film microcavities in the form of Fabry-Perot resonators containing resonating atoms has been developed. The dynamics of transmission of single laser pulses has been analyzed numerically. Analytic solutions of the problem of four-wave mixing of optical fields separated in time have been obtained in the small-area approximation. The dynamic efficiency of conversion of incident waves to the coherent response field (photon echo) generated in a microcavity can be higher than in the case of a bulk resonant structure. Specific features of photon echo generation in a microcavity for arbitrary “areas” of laser pump pulses are discussed.
The effect of two-pulse photon echoes at the complicated action on a two-level medium with large inhomogeneous broadening of supremely short and quasiresonant pulses is investigated. Two versions of the action sequence of both pulses are considered. It is shown that the temporal properties of the echo signal are depended largely on the action order of indicated pulses. The effect of suppression of the optical echoes in the both cases at the action on a medium of the supremely short zeroth 'area' pulse is predicted. The qualitative procedure of definition of the complicated echoes spatial properties has been proposed and applied. It is shown that in indicated cases the diagrams of the echo signal intensity direction are not so peaked as in the case of common light echo.
The active use of resonators in quantum technologies increases the interest of their application in the creation of optical and microwave quantum memory. The use of photon and spin echoes opens up the possibility of storing a large number of light pulses in one such memory cell. High efficiency of such quantum memory is achieved in an optically dense resonant media, in which the formation of a photon (spin) echo can be accompanied by an increase in the nonlinear interaction of light with atoms causing the appearance of multiple echo signals. In this paper, we develop the pulse area approach to study general nonlinear properties of the primary and multi-pulse echo signals excited in a two-level atomic ensemble located in ring cavities with volumetric and surface modes. Conditions under which one or more echo pulses can be generated are analyzed. The solutions obtained are compared with recent experimental results. We show that the area theorem is one of the simplest and most powerful analytical tools for studying a highly nonlinear and dynamical process of the formation of the sequence of photon/spin echo signals in resonant media inside the resonator.