Nanosystems Physics Chemistry Mathematics

Stimulated emission of an atomic system under coherent excitation

A. G. Petrashen, N. V. Sytenko

Published Aug 28, 2015• 0 citations

Abstract

The stimulated emission of a coherently excited atomic system was studied in the presence of a strong magnetic field.

DOI: 10.17586/2220-8054-2015-6-4-562-569

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Nanosystems Physics Chemistry Mathematics

Stimulated emission of an atomic system under coherent excitation

A. G. Petrashen, N. V. Sytenko

Published Aug 28, 2015• 0 citations

Publisher

Abstract

The stimulated emission of a coherently excited atomic system was studied in the presence of a strong magnetic field.

DOI: 10.17586/2220-8054-2015-6-4-562-569

Related papers

Polarization characteristics of emission of an ensemble of atoms on coherent excitation in the presence of a strong magnetic field

A. G. Petrashen, N. V. Sytenko

Optics and SpectroscopyMay 1, 20151 citation

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A. D. Gazazyan, Y. Pashayan-Leroy

Jan 1, 20020 citations

Understanding strong-field coherent control: Measuring single-atom versus collective dynamics

Carlos A Trallero-Herrero, Michael Spanner, Thomas C. Weinacht

We compare the results of two strong field coherent control experiments: one which optimizes multi-photon population transfer in atomic sodium (from the 3s to the 4s state, measured by spontaneous emission from the 3p-3s transition) with one that optimizes stimulated emission on the 3p-3s transition in an ensemble of sodium atoms. Both experiments make use of intense, shaped ultrafast laser pulses discovered by a Genetic Algorithm inside a learning control loop. Optimization leads to improvements in the spontaneous and stimulated emission yields of about $4$ and ${10}^{4}$ , respectively, over an unshaped pulse. We interpret these results by modeling both the single atom dynamics as well as the stimulated emission buildup through numerical integration of Schr\"odinger's and Maxwell's equations. Our interpretation leads to the conclusion that modest yields for controlling single quantum systems can lead to dramatic effects whenever an ensemble of such systems acts collectively following controlled impulsive excitation.We compare the results of two strong field coherent control experiments: one which optimizes multi-photon population transfer in atomic sodium (from the 3s to the 4s state, measured by spontaneous emission from the 3p-3s transition) with one that optimizes stimulated emission on the 3p-3s transition in an ensemble of sodium atoms. Both experiments make use of intense, shaped ultrafast laser pulses discovered by a Genetic Algorithm inside a learning control loop. Optimization leads to improvements in the spontaneous and stimulated emission yields of about $4$ and ${10}^{4}$, respectively, over an unshaped pulse. We interpret these results by modeling both the single atom dynamics as well as the stimulated emission buildup through numerical integration of Schr\"odinger's and Maxwell's equations. Our interpretation leads to the conclusion that modest yields for controlling single quantum systems can lead to dramatic effects whenever an ensemble of such systems acts collectively following controlled impulsive excitation.

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E. V. Baklanov, B Ya Dubetskiĭ, Семибаламут Владимир Михайлович

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4

and

{10}^{4}

, respectively, over an unshaped pulse. We interpret these results by modeling both the single atom dynamics as well as the stimulated emission buildup through numerical integration of Schr\"odinger's and Maxwell's equations. Our interpretation leads to the conclusion that modest yields for controlling single quantum systems can lead to dramatic effects whenever an ensemble of such systems acts collectively following controlled impulsive excitation.