Abstract
The short pulsed, tunable output from the Dutch free electron laser FELIX, coupled with a 45 T pulsed magnet has been used to measure the non-radiative decay rates between Landau levels in n-type InAs/GaSb quantum wells. The decay rate is 2 ps −1 when the cyclotron resonance energy, E CR= E LO=30 meV, and only slightly less, 0.8 ps −1 when E CR=2 E LO when the principal relaxation pathway is the emission of multiple longitudinal optical (LO) phonons.
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