Anomalous spectral shifts of indirect excitons in coupled GaAs quantum wells

Snoke, D. W.; Negoita, V.; Hackworth, D.; Eberl, K.

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Anomalous spectral shifts of indirect excitons in coupled GaAs quantum wells

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Eberl, K.
Former Scientific Facilities, Max Planck Institute for Solid State Research, Max Planck Society;

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Snoke, D. W., Negoita, V., Hackworth, D., & Eberl, K. (2001). Anomalous spectral shifts of indirect excitons in coupled GaAs quantum wells. International Journal of Modern Physics B, 15(28-30), 3606-3610.

Cite as: https://hdl.handle.net/21.11116/0000-000E-E533-6

Abstract

We have studied the energy shifts of Indirect excitons
consisting of an electron in one quantum well and a hole in an
adjacent quantum well. Several surprising effects occur: (1) a
very strong blue shift with increasing intensity of resonant
laser excitation, (2) a very strong red shift with weak
magnetic field, and (3) very low-frequency (sub-Hz)
fluctuations of the spectral position at high excitation
density. We discuss the effect of screening by carriers excited
in the substrate material.