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Filamentation and coalescence of singular optical pulses in narrow-gap semiconductors and modeling of self-organization of vortex solitons using two-photon absorption

Abstract :

Short intense laser pulses with phase singularity propagating in narrow-gap semiconductors are modeled. The saturating nonlinearity is a prerequisite for self-organization of pulses into solitons. The cubic-quintic saturation appears due to the conduction-band nonparabolicity in synergy with the free carriers excitation through two-photon absorption. The pulse stability analyzed using Lyapunov’s method is confirmed by numerical simulations. Depending of its power, a singular Gaussian pulse far from equilibrium either filaments or subsequently coalesces evolving toward vortex soliton. Above breaking power, such a vortex soliton resists to azimuthal symmetry-breaking perturbations.

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https://hal.univ-angers.fr/hal-03192914
Contributeur : Okina Université d'Angers <>
Soumis le : samedi 15 mai 2021 - 16:46:13
Dernière modification le : vendredi 28 mai 2021 - 08:52:04

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Vladimir Skarka, N.-B. Aleksić, M. Derbazi, V.-I. Berezhiani. Filamentation and coalescence of singular optical pulses in narrow-gap semiconductors and modeling of self-organization of vortex solitons using two-photon absorption. Physical Review B, American Physical Society, 2010, 81 (3), ⟨10.1103/PhysRevB.81.035202⟩. ⟨hal-03192914⟩

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