Portal de Periódicos da CAPES

Size-Dependent Tunneling and Optical Spectroscopy of CdSe Quantum Rods

2002; American Physical Society; Volume: 89; Issue: 8 Linguagem: Inglês

10.1103/physrevlett.89.086801

1092-0145

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

Semiconductor Quantum Structures and Devices

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 diameter of the rod and not its length. With increasing diameter, the band gap and the excited state level spacings shift to the red. The level structure was assigned using a multiband effective-mass model, showing a similar dependence on rod dimensions.