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arXiv · 1102.3977

Magnetic field control of intersubband polaritons in narrow-gap semiconductors

Giovanni Pizzi·Francesca Carosella·Gérald Bastard·Robson Ferreira
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Abstract

We investigate theoretically the polariton coupling between the light confined in a planar cavity and the intersubband transitions of a two-dimensional electron gas confined in semiconductor quantum wells in the presence of a vertical magnetic field. We show that in heterostructures made of non-parabolic semiconductors, the polaritons do not fit a two-level problem, since the cavity photons couple to a non-degenerate ensemble of intersubband transitions. As a consequence, the stationary polariton eigenstates become very sensitive to the vertical magnetic field, which thus plays the role of an external parameter that controls the regime of light-matter interactions. At intermediate field strength we predict that the magneto-polaritons have energy dispersions ideally suited to parametric amplification.

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Giovanni Pizzi, Francesca Carosella, Gérald Bastard, Robson Ferreira. 2011-05-12. Magnetic field control of intersubband polaritons in narrow-gap semiconductors. https://doi.org/10.1103/physrevb.83.245318

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