Observation of electronic subbands in dense arrays of quantum wires grown by organometallic-chemical-vapor deposition on nonplanar substrates
- 15 March 1992
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 45 (11), 6333-6336
- https://doi.org/10.1103/physrevb.45.6333
Abstract
We report luminescence and adsorption properties of dense arrays of narrow (14-nm), crescent-shaped GaAs/ As quantum wires (QWR’s) grown by organometallic chemical vapor deposition on nonplanar substrates. Low-temperature photoluminescence (PL) spectra of the samples are dominated by emission from the QWR’s, indicating efficient carrier transfer into the wires from the surrounding quantum wells and barriers. PL excitation spectra of the wires exhibit enhanced absorption at the electron–heavy-hole subbands with a measured subband separation of 34–39 meV, in good agreement with calculated values. Achievement of such large subband separations, on the order of T at room temperature (for electrons), is important for investigations of quasi-one-dimensional systems in which only the ground state of the QWR is populated.
Keywords
This publication has 13 references indexed in Scilit:
- Vertically stacked multiple-quantum-wire semiconductor diode lasersApplied Physics Letters, 1991
- Growth of GaAs quantum wire arrays by organometallic chemical vapor deposition on submicron gratingsApplied Physics Letters, 1990
- Time-resolved investigations of sidewall recombination in dry-etched GaAs wiresApplied Physics Letters, 1990
- Optical properties of III–V semiconductor quantum wires and dotsJournal of Luminescence, 1990
- Determination of nonradiative surface layer thickness in quantum dots etched from single quantum well GaAs/AlGaAsApplied Physics Letters, 1989
- Stimulated emission in semiconductor quantum wire heterostructuresPhysical Review Letters, 1989
- Optical investigations on the mobility of two-dimensional excitons in GaAs/As quantum wellsPhysical Review B, 1989
- Linear and nonlinear optical properties of semiconductor quantum wellsAdvances in Physics, 1989
- Molecular beam epitaxy of GaAs/AlGaAs superlattice heterostructures on nonplanar substratesApplied Physics Letters, 1987
- Quantum well lasers--Gain, spectra, dynamicsIEEE Journal of Quantum Electronics, 1986