2D–1D crossover from quantum well to quantum wire behaviour in GaAs v-groove structures

✍ Scribed by R Roshan; N.I Cade; A.C Maciel; J.F Ryan; A Schwarz; Th Schäpers; H Lüth

• Publisher: Elsevier Science
• Year: 2002
• Tongue: English
• Weight: 235 KB
• Volume: 13
• Category: Article
• ISSN: 1386-9477
• DOI: 10.1016/s1386-9477(01)00513-6

✦ Synopsis

The distribution of electron current in GaAs=AlGaAs v-groove quantum wire structures with groove widths varying from 1 to 25 m has been studied using far-and near-ÿeld spectroscopy techniques. We ÿnd clear evidence of the formation of 'corner' quantum wires in wide grooves which coalesce to form single wires in grooves with widths narrower than ∼ 5 m. Spatially resolved photoluminescence measurements in the presence of an applied voltage provide information about the distribution of current in the device.