๐”– Bobbio Scriptorium
โœฆ   LIBER   โœฆ

Energy sublevels in an Al0.5Ga0.5As/GaAs/Al0.5Ga0.5As quantum wire

โœ Scribed by Y Fu; M Willander; X.Q Liu; W Lu; S.C Shen; H.H Tan; S Yuan; C Jagadish

Publisher
Elsevier Science
Year
1999
Tongue
English
Weight
237 KB
Volume
26
Category
Article
ISSN
0749-6036

No coin nor oath required. For personal study only.

โœฆ Synopsis

We report the successful fabrication of a V-groove Al 0.5 Ga 0.5 As/GaAs/Al 0.5 Ga 0.5 As quantum wire system and the temperature-dependent photoluminescence (PL) measurement. The PL spectra are dominated by four features at 681, 642, 635 and 621 nm attributed to the luminescences from quantum wire, top, vertical and side-wall well regions by micro-PL measurements. By the calculations of the energy structure, discrete states (localized sublevels) in the quantum wire region and continuum states (extended along the side-wall and vertical quantum wells) in side-wall and vertical quantum wells have been obtained in both the conduction and valence bands. The calculated excitation energies explain very well the peak positions and their temperature dependence in the photoluminescence measurements.

๐Ÿ“œ SIMILAR VOLUMES

Excited State Dynamics in In0.5Al0.04Ga0
Excited State Dynamics in In0.5Al0.04Ga0.46As/Al0.08Ga0.92As Self-Assembled Quantum Dots
โœ L.M. Smith; K. Leosson; J. Erland; J.R. Jensen; J.M. Hvam; V. Zwiller ๐Ÿ“‚ Article ๐Ÿ“… 2001 ๐Ÿ› John Wiley and Sons ๐ŸŒ English โš– 98 KB ๐Ÿ‘ 1 views

We use time-resolved photoluminescence spectroscopy to probe the relaxation of excited states in In 0.5 Al 0.04 Ga 0.46 As/Al 0.08 Ga 0.92 As self-assembled quantum dots. The relaxation rate of excitons confined to the quantum dots increases by nearly an order of magnitude as the energy of the state

Type Iโ€“Type II Transition of Self-Assemb
Type Iโ€“Type II Transition of Self-Assembled In0.55Al0.45As/Al0.5Ga0.5As Quantum Dots
โœ G.H. Li; Y. Chen; Z.L. Fung; K. Ding; H.X. Han; W. Zhou; Z.G. Wang ๐Ÿ“‚ Article ๐Ÿ“… 2001 ๐Ÿ› John Wiley and Sons ๐ŸŒ English โš– 165 KB ๐Ÿ‘ 1 views

The photoluminescence (PL) of In 0.55 Al 0.45 As/Al 0.5 Ga 0.5 As self-assembled quantum dots has been measured at 15 and 80 K under hydrostatic pressure. The lateral size of the dots ranges from 7 to 62 nm. The emissions from the dots with 26, 52 and 62 nm size have a blue shift under pressure, ind