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Graphene for coherent THz emission at room temperature - Juliette Mangeney - Jeudi 14 mars 2019 à 10 h 30

INSP - Sorbonne Université - 4 place Jussieu - 75005 Paris - Barre 22-12, 4e étage, salle 426

Juliette Mangeney - LPA (ENS)

Abstract

Graphene possesses many exceptional properties that are highly attractive to develop new THz technology, such as a gap-less electronic band structure, high electron mobility and large optical phonon energy. In this talk, I will first present coherent THz emission from graphene relying on photon drag effect. I will then show the existence of interband transitions in graphene at THz frequencies suggesting that THz lasing in graphene may be possible. I will also discuss the relaxation of hot carriers close to the Dirac point in graphene-hBN van der Waals heterostructures and their out-of-plane coupling to the hyperbolic phonon polaritons in the hBN material.