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arXiv · 0909.1212

Measurement of the infrared transmission through a single doped GaAs quantum well in an external magnetic field: Evidence for polaron effects

C. Faugeras·M. Orlita·S. Deutschlander·G. Martinez·P. Y. Yu·A. Riedel·R. Hey·K. J. Friedland
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Abstract

Precise absolute far-infra-red magneto-transmission experiments have been performed in magnetic fields up to 33 T on a series of single GaAs quantum wells doped at different levels. The transmission spectra have been simulated with a multilayer dielectric model. The imaginary part of the optical response function which reveals new singular features related to the electron-phonon interactions has been extracted. In addition to the expected polaronic effects due to the longitudinal optical (LO) phonon of GaAs, a new kind of carrier concentration dependent interaction with interface phonons is observed. A simple physical model is used to try to quantify these interactions and explore their origin.

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C. Faugeras, M. Orlita, S. Deutschlander, G. Martinez, P. Y. Yu, A. Riedel, R. Hey, K. J. Friedland. 2009-09-07. Measurement of the infrared transmission through a single doped GaAs quantum well in an external magnetic field: Evidence for polaron effects. https://doi.org/10.1103/physrevb.80.073303

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