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Intersubband terahertz transitions in Landau level system of cascade GaAs/AlGaAs quantum well structures in strong tilted magnetic field

Maksim P Telenkov12*, Yury A Mityagin1 and Petr F Kartsev3

Author Affiliations

1 Solid State Physics Dept., P.N.Lebedev Physical Institute, Moscow 119991, Russia

2 Theoretical Physics and Quantum Technologies Dept., Moscow Institute for Steel and Alloys, Moscow 119049, Russia

3 National Research Nuclear Center MEPHI, Moscow 115409, Russia

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Nanoscale Research Letters 2012, 7:491  doi:10.1186/1556-276X-7-491

Published: 31 August 2012


The tunable terahertz intersubband Landau level transitions in resonant tunneling cascade quantum well structures are considered. The way of lifting the selection rule forbidding the inter-Landau level terahertz transitions of interest by applying a magnetic field tilted with respect to the structure layers is proposed. The importance of asymmetric structure design to achieve considerable values of transition dipole matrix elements is demonstrated.

Quantum well structures; Landau levels; terahertz transitions.