Near-forward Raman scattering by bulk and surface phonon-polaritons in the model percolation-type ZnBeSe alloy

R. Hajj Hussein (1) , O. Pagès (1) , F. Firszt (2) , W. Paszkowicz (3) , A. Maillard (4)

1 LCP-A2MC - Laboratoire de Chimie et Physique - Approche Multi-échelle des Milieux Complexes
2 Institute of Physics
3 IFPAN - Institute of Physics [Warsaw]
4 LMOPS - Laboratoire Matériaux Optiques, Photonique et Systèmes

We study the bulk and surface phonon-polaritons of the Zn0.67Be0.33Se zincblende alloy by near-forward Raman scattering. The short (Be-Se) bond exhibits a distinct percolation doublet in the conventional backscattering Raman spectra, corresponding to a three-mode behavior in total [1××(Zn-Se), 2××(Be-Se)] for Zn0.67Be0.33Se. This offers an opportunity to achieve a refined understanding of the phonon-polariton modes of a zincblende alloy beyond the current two-mode approximation, corresponding to a [1××(Zn-Se), 1××(Be-Se)] description in the present case. The discussion is supported by contour modeling of the Raman signals of the multi-mode bulk and surface phonon-polaritons within the formalism of the linear dielectric response.

Mots clés: ZnBeSe; Raman Scattering

Domaines: Science des matériaux [cond-mat.mtrl-sci]

R. Hajj Hussein, O. Pagès, F. Firszt, W. Paszkowicz, A. Maillard. Near-forward Raman scattering by bulk and surface phonon-polaritons in the model percolation-type ZnBeSe alloy. Applied Physics Letters, 2013, 103 (7), pp. 071912. ⟨10.1063/1.4818663⟩. ⟨hal-01226988⟩