1. Microphotoluminescence spectroscopy of vertically stackedInxGa1−xAs/GaAsquantum wires
- Author
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Y. Arakawa, Massimo Catalano, F. Sogawa, Lorenzo Vasanelli, Ross Rinaldi, M. DeVittorio, Antonietta Taurino, Adriana Passaseo, and Roberto Cingolani
- Subjects
Condensed Matter::Materials Science ,Microprobe ,Materials science ,Condensed matter physics ,Atomic force microscopy ,Monolayer ,Micron scale ,Condensed Matter::Mesoscopic Systems and Quantum Hall Effect ,Luminescence ,Spectroscopy ,Molecular physics ,Quantum ,Doppler broadening - Abstract
Disorder and spectral broadening of vertically stacked InGaAs/GaAs V-grooved quantum wires have been investigated by means of microprobe luminescence. We show that the main spectral broadening mechanism originates from monolayer fluctuations at the bottom of the wire. A direct evidence of monolayer height islands of area $40\ifmmode\times\else\texttimes\fi{}40\mathrm{nm}$ formed at the bottom of the grooves is provided by atomic force microscopy. Lateral and vertical wire-to-wire fluctuations are found to be negligible on the micron scale.
- Published
- 1998