0000000000023379

AUTHOR

Andrei I. Maimistov

showing 3 related works from this author

Vector π pulse soliton in coherent optical amplifiers

2007

We found a novel type of vector soliton pulse in a medium with linear loss and nonlinear gain from the coherent resonant interaction of light with two-level atoms exhibiting a degenerate upper state.

Optical amplifierPhysicsOpticsVector solitonbusiness.industryDegenerate energy levelsNonlinear opticsSoliton (optics)Stimulated emissionAtomic physicsbusinessCircular polarizationPulse (physics)2007 Quantum Electronics and Laser Science Conference
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Electromagnetically induced switching of ferroelectric thin films

2007

We analyze the interaction of an electromagnetic spike (one cycle) with a thin layer of ferroelectric medium with two equilibrium states. The model is the set of Maxwell equations coupled to the undamped Landau-Khalatnikov equation, where we do not assume slowly varying envelopes. From linear-scattering theory, we show that low-amplitude pulses can be completely reflected by the medium. Large-amplitude pulses can switch the ferroelectric. Using numerical simulations and analysis, we study this switching for long and short pulses, estimate the switching times, and provide useful information for experiments.

010302 applied physicsPhysicsCondensed matter physicsScatteringNumerical analysisThin layerFOS: Physical sciencesPattern Formation and Solitons (nlin.PS)Condensed Matter Physics01 natural sciencesFerroelectricityNonlinear Sciences - Pattern Formation and SolitonsElectronic Optical and Magnetic Materialssymbols.namesakeAmplitudeMaxwell's equations0103 physical sciencessymbolsFerroelectric thin filmsThin film010306 general physicsComputingMilieux_MISCELLANEOUS
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Coherent vector pi-pulse in optical amplifiers

2007

We obtain an exact vector solitary solution for the amplification of an optical pulse with a time width short compared with both population and polarization decay time. This dissipative soliton results from the balance between the gain from inverted resonant two-level atoms and the linear loss of the host material. We suppose that the excited state of the active centers is degenerate on the projection of the angular moment. Numerical simulations demonstrate the stability of these vector dissipative solitons in the presence of both linear birefringence and group velocity dispersion of the host material.

PhysicsAngular momentumLinear polarizationFOS: Physical sciencesStatistical and Nonlinear PhysicsPattern Formation and Solitons (nlin.PS)Elliptical polarizationPolarization (waves)Nonlinear Sciences - Pattern Formation and SolitonsAtomic and Molecular Physics and OpticsDissipative solitonQuantum mechanicsExcited stateAtomic physicsGround stateCircular polarization
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