SEGHILANI, Mohamed S.; MYARA, Mikhael; SELLAHI, Mohamed; LEGRATIET, Luc; SAGNES, Isabelle; BEAUDOIN, Gregoire; LALANNE, Philippe; GARNACHE, Arnaud

doi:10.1038/srep38156

Métadonnées

Afficher la notice complète

Licence d’utilisation du document

SEGHILANI, Mohamed S.
Institut d’Electronique et des Systèmes [IES]

MYARA, Mikhael
Institut d’Electronique et des Systèmes [IES]
Térahertz, hyperfréquence et optique [TéHO]

SELLAHI, Mohamed
Institut d’Electronique et des Systèmes [IES]

Langue

Article de revue

Ce document a été publié dans

Scientific Reports. 2016-12-05, vol. 6, p. 38156

Nature Publishing Group

Résumé en anglais

The generation of a coherent state, supporting a large photon number, with controlled orbital-angular-momentum L = ħl (of charge l per photon) presents both fundamental and technological challenges: we demonstrate a surface-emitting laser, based on III-V semiconductor technology with an integrated metasurface, generating vortex-like coherent state in the Laguerre-Gauss basis. We use a first order phase perturbation to lift orbital degeneracy of wavefunctions, by introducing a weak anisotropy called here “orbital birefringence”, based on a dielectric metasurface. The azimuthal symmetry breakdown and non-linear laser dynamics create “orbital gain dichroism” allowing selecting vortex handedness. This coherent photonic device was characterized and studied, experimentally and theoretically. It exhibits a low divergence (<1°) diffraction limited beam, emitting 49 mW output power in the near-IR at λ ≃ 1 μm, a charge l = ±1, … ±4 (>50 dB vortex purity), and single frequency operation in a stable low noise regime (0.1% rms). Such high performance laser opens the path to widespread new photonic applications.< Réduire

Métadonnées

Partager cette publication !

Licence d’utilisation du document

Vortex Laser based on III-V semiconductor metasurface: direct generation of coherent Laguerre-Gauss modes carrying controlled orbital angular momentum

Langue

Ce document a été publié dans

Résumé en anglais

URI

DOI

Origine

Unités de recherche