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Size dependent tunneling and optical spectroscopy of CdSe quantum rods

David Katz·Tommer Wizansky·Oded Millo·Eli Rothenberg·Taleb Mokari·Uri Banin
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Abstract

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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David Katz, Tommer Wizansky, Oded Millo, Eli Rothenberg, Taleb Mokari, Uri Banin. 2002-07-16. Size dependent tunneling and optical spectroscopy of CdSe quantum rods. https://doi.org/10.1103/physrevlett.89.086801

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