Abstract
We report the structural and optical properties of high-quality GaAs/AlGaAs quantum wire superlattices (QWR-SL) grown by low-pressure organometallic chemical vapor deposition (LP-OMCVD) on V-grooved GaAs substrates. A clear, peculiar self-limited growth behavior of the QWR-SL is demonstrated. A simple model based on the adiabatic approximation is developed to calculate the QWR-SL eigenstates. This model is employed to study the effects of coupling and localization on the SL wave functions. We use photoluminescence (PL) and linearly polarized PL excitation to investigate the optical properties of our QWR-SLs. A significant change in the shape and polarization anisotropy of the spectra is observed for barrier thicknesses below 3 nm, attributed to the transition between a weakly coupled multiple quantum wire regime with localized states to a strongly coupled QWR-SL regime with states delocalized over the structure.
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