Magneto-luminescence study of quasi-one-dimensional-electron-hole plasmas in lattice-matched InGaAs/InP quantum wires
✍ Scribed by J. Hammersberg; H. Weman; M. Notomi; T. Tamamura
- Publisher
- Elsevier Science
- Year
- 1994
- Tongue
- English
- Weight
- 262 KB
- Volume
- 16
- Category
- Article
- ISSN
- 0749-6036
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✦ Synopsis
The photoluminescence (PL) properties of undoped (\operatorname{InGaAs} / \mathrm{InP}) quantum wires are studied in a magnetic field up to (16 \mathrm{~T}). The quantum wires are fabricated with a combination of electron-beam lithography, reverse mesa wet etching, and metal organic-vapour-phase epitaxy overgrowth. Here we report results on wires with a vertical width of (50 \AA) and lateral widths from (450 \AA) to (200 \AA). The purpose of this work is to study the influence of a magnetic field on the quasi-one-dimensional subbands in a quantum wire. We have also studied many particle interactions in these quasi-one-dimensional semiconductor structures. A high carrier density is achieved by high intensity (\mathrm{cw}) photo-excitation that is filling both conduction and valence bands states. In this way it is possible to observe several quasi-one-dimensional subbands and follow their evolution with increasing magnetic field and increasing electron-hole plasma density. We are able to follow how the quasi-one-dimensional subbands merge into quasi-two-dimensional Landau levels. One effect of the lateral barriers is the quenching of classical Landau-orbits with cyclotron-diameter wider than the wire width. By varying the pump intensity at (14 \mathrm{~T}) we observe some intriguing wire width dependent many-body effects.