Inhomogeneous Broadening Effect in THz Acoustic Cavities

G. ROZAS, B. JUSSERAND, A. FAINSTEIN, AND A. LEMAÎTRE

CHINESE JOURNAL OF PHYSICS

PHYSICAL SOC REPUBLIC CHINA

Lugar: Taipei; Año: 2011 vol. 49 p. 111 - 117

0577-9073

What is the lifetime of a cavity confined acoustic phonon in the relevant THz range, and what are its limiting factors, are questions of importance both from fundamental and device application perspectives. We present a model to study the effects of inhomogeneous broadening in planar acoustic cavities, separating the relative contributions of the superlattices and the cavity spacer. We contrast this model with ultra-high resolution Raman experiments in 1 THz semiconductor acoustic cavities and propose possible explanations for the discrepancies.