One- and two-photon spectroscopy in hexagonal boron nitride Auteur(s): Cassabois G.
Conférence invité: PLMCN17 (Nara, JP, 2016-03-28) Ref HAL: hal-01358449_v1 Exporter : BibTex | endNote Résumé: I will discuss our recent experiments by one- and two-photon spectroscopy demonstrating that hBN is an indirect bandgap material. I will show that the optical properties of hBN are profoundly determined by phonon-assisted transitions involving either virtual or real excitonic states. I will present our measurements of the exciton binding energy by two-photon excitation, leading to the estimation of 6.08 eV for the single-particle bandgap in hBN. |