Recent Publications

Myrta Gruening

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  1. Title: Erratum: Second harmonic generation in h-BN and MoS2 monolayers: Role of electron-hole interaction

    Author(s): Gruening M., Attaccalite C.

    Physical Review B, 90, No. 19, pp. 199901- (November 2014)

    doi: 10.1103/PhysRevB.90.199901
    Abstract



  2. Title: Second harmonic generation in h-BN and MoS2 monolayers: Role of electron-hole interaction

    Author(s): Gruening M., Attaccalite C.

    Physical Review B (Rapid), 89, pp. 081102- (2014)

    doi: 10.1103/PhysRevB.89.081102
    Abstract



    We study second-harmonic generation in h-BN and MoS$_2$ monolayers using a novel \emph{ab initio} approach based on Many-body theory. We show that electron-hole interaction doubles the signal intensity at the excitonic resonances with respect to the contribution from independent electronic transitions. This implies that electron-hole interaction is essential to describe second-harmonic generation in those materials. We argue that this finding is general for nonlinear optical properties in nanostructures and that the present methodology is the key to disclose these effects.