Landau-level lifetimes in PbTe nipi superlattices, PbTe/PbEuTe and InAs/AlSb quantum wells

C. J G M Langerak, B. N. Murdin, C. M. Ciesla, J. Oswald, A. Homer, G. Springholz, G. Bauer, R. A. Stradling, M. Kamal-Saadi, E. Gornik, C. R. Pidgeon

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)


Landau-level lifetimes are determined from saturation cyclotron resonance (CR) in wide parabolic wells, quantum wells and bulk PbTe-Pb1 - xEuxTe systems. These narrow gap structures exhibit strong band non-parabolicity necessary to terminate the normally equi-spaced Landau-level ladder. It was not possible to saturate the bulk sample, but short lifetimes, of between 1.5 and 8 ps, were obtained for the wide parabolic well and the quantum well, respectively, utilising a multi-level rate equation model. We also report the first pump-probe cyclotron resonance result in an InAs-AlSb quantum structure. The pump-probe experiment provides a direct determination of the lifetime, giving t = 40 ps in this InAs-AlSb sample. This shows good agreement with an 8 × 8k · p calculation. © 1998 Elsevier Science B.V. All rights reserved.

Original languageEnglish
Pages (from-to)121-125
Number of pages5
JournalPhysica E: Low-Dimensional Systems and Nanostructures
Issue number1-4
Publication statusPublished - 15 Jul 1998


  • Landau-level lifetimes
  • Saturation spectroscopy


Dive into the research topics of 'Landau-level lifetimes in PbTe nipi superlattices, PbTe/PbEuTe and InAs/AlSb quantum wells'. Together they form a unique fingerprint.

Cite this