Size dependent tunneling and optical spectroscopy of CdSe quantum rods

Details Size dependent tunneling and optical spectroscopy of CdSe quantum rods Size dependent tunneling and optical spectroscopy of CdSe quantum rods

2002-07-16

arxiv.org/abs/cond-mat/0207389v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

Accepted to PRL (nearly final version). 4 pages in revtex, 4 figures

Scientific paper

10.1103/PhysRevLett.89.086801

Photoluminescence excitation spectroscopy and scanning tunneling spectroscopy are used to study the electronic states in CdSe quantum rods that manifest a transition from a zero dimensional to a one dimensional quantum confined structure. Both optical and tunneling spectra show that the level structure depends primarily on the rod diameter and not on length. With increasing diameter, the band-gap and the excited state level spacings shift to the red. The level structure was assigned using a multi-band effective-mass model, showing a similar dependence on rod dimensions.

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