Thickness Dependence of Surface and Interface Phonon-Polariton Modes in InN/AlN Nanolayers
We study the conditions for appearance and observation of surface and interface phonon-polariton (SPP and IPP) modes in thin InN layers grown on sapphire using AlN buffer. Theoretical dispersion relations of the IPP modes in the system air/InN/AlN/sapphire for different thickness of the InN layer are obtained. Features in the experimentally measured infrared reflectance were associated with the appearance of interface phonon-polariton excitations at wave-numbers between the TO and LO modes.
Lilyana Kolakieva and Roumen Kakanakov
E. Valcheva et al., "Thickness Dependence of Surface and Interface Phonon-Polariton Modes in InN/AlN Nanolayers", Solid State Phenomena, Vol. 159, pp. 77-80, 2010