Confined optical phonon modes in polar tetrapod nanocrystals detected by resonant inelastic light scattering
arXiv:cond-mat/0512541 · doi:10.1021/nl0524492
Abstract
We investigated CdTe nanocrystal tetrapods of different sizes by resonant inelastic light scattering at room temperature and under cryogenic conditions. We observe a strongly resonant behavior of the phonon scattering with the excitonic structure of the tetrapods. Under resonant conditions we detect a set of phonon modes that can be understood as confined longitudinal-optical phonons, surface-optical phonons, and transverse-optical phonons in a nanowire picture.
12 pages, 4 figures