Quantum-size shift in PbTe/BaF2MQW structure photoluminescence spectra

✍ Scribed by I.I. Zasavitskii; E.V. Bushuev; S.O. Ferreira; P. Motisuke; I.N. Bandeira

• Publisher: Elsevier Science
• Year: 1999
• Tongue: English
• Weight: 70 KB
• Volume: 25
• Category: Article
• ISSN: 0749-6036
• DOI: 10.1006/spmi.1998.0600

✦ Synopsis

PbTe/BaF 2 multi-quantum-well (MQW) structures were grown on cleaved (111) BaF 2 substrates by the MBE method. The substrate temperature was 330 • C. The MQWs consist of 10 pairs of 10 nm thickness BaF 2 barriers and PbTe wells with widths ranging from 5 to 20 nm. For this highly mismatched system we have measured photoluminescence spectra at 77 K and have demonstrated the quantum-size confinement consistent with the model of wells with infinite barriers. A remarkable deformation shift due to the thermal expansion coefficient difference is observed at cryogenic temperatures.