Manifestation of electron-phonon interactions in IR-induced second harmonic generation in a sulphide glass-ceramic with β-GeS2 microcrystallites - Université de Rennes Accéder directement au contenu
Article Dans Une Revue Physica B: Condensed Matter Année : 2007

Manifestation of electron-phonon interactions in IR-induced second harmonic generation in a sulphide glass-ceramic with β-GeS2 microcrystallites

I. V. Kityk
  • Fonction : Auteur correspondant
  • PersonId : 853819

Connectez-vous pour contacter l'auteur
Marie Guignard
Xianghua Zhang
Johann Troles

Résumé

The non-linear optical response of sulphide glass-containing β-GeS2 microcrystallites, has been studied at a fundamental wavelength of λ=5.5 μm under additional irradiation by IR-pulses of λ=3.7 μm. A substantial increase of the non-linear susceptibility with IR-power and size of the microcrystallites has been found. Molecular dynamics calculations linked to quantum chemical calculations show that this effect could be explained by substantial contributions of the microcrystallite interfaces and due to the phonon sub-system. The role of anharmonic electron-phonon effects is experimentally confirmed by the observation of an optimal delay of 8 ps between the pump laser pulses at 3.7 μm and the probing laser pulses at 5.5 μm, which generate the observed second harmonic signal.

Domaines

Matériaux

Dates et versions

hal-00370061 , version 1 (23-03-2009)

Identifiants

Citer

I. V. Kityk, Marie Guignard, Virginie Nazabal, Xianghua Zhang, Johann Troles, et al.. Manifestation of electron-phonon interactions in IR-induced second harmonic generation in a sulphide glass-ceramic with β-GeS2 microcrystallites. Physica B: Condensed Matter, 2007, 391 (2), pp.222-227. ⟨10.1016/j.physb.2006.09.023⟩. ⟨hal-00370061⟩
93 Consultations
0 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More