Holger Lange et al 2009 Nanotechnology 20 045705 doi:10.1088/0957-4484/20/4/045705
Holger Lange1, Mikhail Artemyev2, Ulrike Woggon3 and Christian Thomsen1
Show affiliationsWe investigated the geometry dependence of the first-order Raman scattering band of CdSe nanorods experimentally. The band has an asymmetric shape and its position and exact line shape depend on the nanorod diameter and aspect ratio. The band consists of contributions from the longitudinal optical phonon and surface optical phonon modes. While the position of the longitudinal optical phonon related band is purely diameter dependent, the position of the surface optical phonon band depends on the nanorod's aspect ratio. This can be explained by the influence of phonon confinement and a model for surface optical phonons in nanorods.
63.22.-m Phonons or vibrational states in low-dimensional structures and nanoscale materials
61.46.-w Structure of nanoscale materials
78.67.-n Optical properties of low-dimensional, mesoscopic, and nanoscale materials and structures
Condensed matter: electrical, magnetic and optical
Issue 4 (28 January 2009)
Received 14 August 2008, in final form 11 November 2008
Published 19 December 2008
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