Modeling of Brillouin Spectrum of a Quantum Dot Crystal

Olga L. Lazarenkova and Alexander A. Balandin
Dept. of Electrical Engineering, UC Riverside, US

Keywords: nanostructures, quantum dots, phonons, Raman

Abstract:
Model for simulation of the Brillouin spectra of three- dimensional regimented array of GeSi quantum dots in Si is proposed. We consider the low-energy part of the Raman spectrum that is determined by the transformed modes of three-dimensional folded acoustic phonons. These spectra are based on the phonon spectra found by numerical solution of elasticity equation. Shift and redistribution of intensity of Raman-active peaks depending on the composition of the GeSi solid solution, interdot distances, and quantum dot geometry are studied.

NSTI Nanotech 2003 Conference Technical Program Abstract