Phonon-Photon Mapping in a Color Center in Hexagonal Boron Nitride

T. Q. P. Vuong, G. Cassabois, P. Valvin, A. Ouerghi, Y. Chassagneux, C. Voisin, and B. Gil
Phys. Rev. Lett. 117, 097402 – Published 25 August 2016
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Abstract

We report on the ultraviolet optical response of a color center in hexagonal boron nitride. We demonstrate a mapping between the vibronic spectrum of the color center and the phonon dispersion in hexagonal boron nitride, with a striking suppression of the phonon assisted emission signal at the energy of the phonon gap. By means of nonperturbative calculations of the electron-phonon interaction in a strongly anisotropic phonon dispersion, we reach a quantitative interpretation of the acoustic phonon sidebands from cryogenic temperatures up to room temperature. Our analysis provides an original method for estimating the spatial extension of the electronic wave function in a point defect.

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  • Received 23 March 2016

DOI:https://doi.org/10.1103/PhysRevLett.117.097402

© 2016 American Physical Society

Physics Subject Headings (PhySH)

Condensed Matter, Materials & Applied Physics

Authors & Affiliations

T. Q. P. Vuong1, G. Cassabois1, P. Valvin1, A. Ouerghi2, Y. Chassagneux3, C. Voisin3, and B. Gil1,*

  • 1Laboratoire Charles Coulomb, UMR 5221 CNRS-Université de Montpellier, 34095 Montpellier, France
  • 2Laboratoire de Photonique et de Nanostructures (CNRS-LPN), Route de Nozay, 91460 Marcoussis, France
  • 3Laboratoire Pierre Aigrain, Ecole Normale Supérieure, Université Paris Diderot, UPMC, CNRS UMR8551, 24 rue Lhomond, 75005 Paris, France

  • *bernard.gil@umontpellier.fr

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Issue

Vol. 117, Iss. 9 — 26 August 2016

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