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Confinement Effects on Optical Phonons in Polar Tetrapod Nanocrystals Detected by Resonant Inelastic Light Scattering

Krahne, Roman ; Chilla, Gerwin ; Schüller, Christian ; Carbone, Luigi ; Kudera, Stefan ; Mannarini, Gianandrea ; Manna, Liberato ; Heitmann, Detlef ; Cingolani, Roberto
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Date of publication of this fulltext: 05 Aug 2009 13:32


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.


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