Phys. Rev. B 67, 085301 (2003) [7 pages]Excitonic states in CdTe/Cd0.74Mg0.26Te quantum wires grown on vicinal substratesReceived 6 March 2002; revised 28 August 2002; published 4 February 2003 We have investigated excitonic luminescence from CdTe/Cd0.74Mg0.26Te quantum wires (QWR’s) grown on vicinal substrates. The temperature dependence of the radiative lifetime of one-dimensional exciton in the QWR’s was measured using time-resolved spectroscopy. The results are compared with that of two-dimensional exciton in CdTe/Cd0.74Mg0.26Te quantum well (QW). The radiative lifetimes of one-dimensional exciton in the QWR’s and two-dimensional exciton in the QW increase with T but show clearly different behavior. The observed radiative lifetime in the QWR’s obeys T1/2 in a wide temperature range, confirming the one-dimensional nature in exciton thermalization. On the other hand, the radiative lifetime in the QW is linear with T. Furthermore, we observed clear biexciton formation at ≲10K in the QWR’s. The biexciton binding energy estimated from the line-shape analysis of the luminescence spectra for the QWR’s is 5.2 meV. © 2003 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevB.67.085301
DOI:
10.1103/PhysRevB.67.085301
PACS:
78.55.Et, 78.66.Hf
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