Accueil du site Séminaires Seminaire MCBT

Seminaire MCBT

Mardi 11 février 2014 à 11h00,
Salle Louis Weil, E424

Orateur : Claudio Attaccalite (Institut Néel - MCBT)
"Ab-initio real-time spectroscopy : application to non-linear optics"

Abstract

I will present a real-time approach to study non-linear response in Condensed Matter systems that is especially suitable for crystalline solids. I will show how this approach can be used to study non-linear optical properties and in particular second and third harmonic generation in bulk semiconductors. Finally I will present results for the second-harmonic generation spectrum of h-BN or MoS2 monolayers and show how correlation eff-ects double the signal intensity at the excitonic resonances with respect to the contribution from independent electronic transitions.

References :
[1] Nonlinear optics from ab-initio by means of the dynamical Berry-phase
C. Attaccalite and M. Gruning
Phys. Rev. B 88 (23), 235113
[2] Second Harmonic Generation in h-BN and MoS2 monolayers : the role of electron-hole interaction
M. Gruning and C. Attaccalite
Phys. Rev. B 89, 081102(R) (2014)

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