TY - JOUR
T1 - Landau-level lifetimes in PbTe nipi superlattices, PbTe/PbEuTe and InAs/AlSb quantum wells
AU - Langerak, C. J G M
AU - Murdin, B. N.
AU - Ciesla, C. M.
AU - Oswald, J.
AU - Homer, A.
AU - Springholz, G.
AU - Bauer, G.
AU - Stradling, R. A.
AU - Kamal-Saadi, M.
AU - Gornik, E.
AU - Pidgeon, C. R.
PY - 1998/7/15
Y1 - 1998/7/15
N2 - 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.
AB - 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.
KW - Landau-level lifetimes
KW - Saturation spectroscopy
UR - http://www.scopus.com/inward/record.url?scp=0348199643&partnerID=8YFLogxK
U2 - 10.1016/S1386-9477(98)00027-7
DO - 10.1016/S1386-9477(98)00027-7
M3 - Article
SN - 1386-9477
VL - 2
SP - 121
EP - 125
JO - Physica E: Low-Dimensional Systems and Nanostructures
JF - Physica E: Low-Dimensional Systems and Nanostructures
IS - 1-4
ER -