Enhancement of Rabi Splitting in a Microcavity with an Embedded Superlattice

Details Enhancement of Rabi Splitting in a Microcavity with an Embedded Superlattice Enhancement of Rabi Splitting in a Microcavity with an Embedded Superlattice

2001-04-12

arxiv.org/abs/cond-mat/0104241v1

Physics

Condensed Matter

5 pages, 4 figures, submitted to PRB

Scientific paper

10.1103/PhysRevB.64.155302

We have observed a large coupling between the excitonic and photonic modes of an AlAs/AlGaAs microcavity filled with an 84-({\rm {\AA}})/20({\rm {\AA}}) GaAs/AlGaAs superlattice. Reflectivity measurements on the coupled cavity-superlattice system in the presence of a moderate electric field yielded a Rabi splitting of 9.5 meV at T = 238 K. This splitting is almost 50% larger than that found in comparable microcavities with quantum wells placed at the antinodes only. We explain the enhancement by the larger density of optical absorbers in the superlattice, combined with the quasi-two-dimensional binding energy of field-localized excitons.

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