Optical vibrons in CdSe dots and dispersion relation of the bulk material

C. Trallero-Giner; A. Debernardi; M. Cardona; E. Menéndez-Proupín; A. I. Ekimov

doi:10.1103/PhysRevB.57.4664

Optical vibrons in CdSe dots and dispersion relation of the bulk material

C. Trallero-Giner, A. Debernardi, M. Cardona, E. Menéndez-Proupín, and A. I. Ekimov

Phys. Rev. B 57, 4664 – Published 15 February 1998

Abstract

We examine the dependence on size distribution of the Raman line shape of optical vibron modes in CdSe dots. A detailed comparison with the theory of electron-hole correlated Raman scattering in spherical quantum dots, which includes LO-confined modes, is carried out. The obtained CdSe vibron frequencies are found to map well on the ab initio calculated LO phonon dispersion relations of wurtzite CdSe along the [001] direction of the Brillouin zone.