Photovoltaic Probe of Cavity Polaritons in a Quantum Cascade Structure

Details Photovoltaic Probe of Cavity Polaritons in a Quantum Cascade Structure Photovoltaic Probe of Cavity Polaritons in a Quantum Cascade Structure

2007-03-07

arxiv.org/abs/quant-ph/0703052v1

Physics

Quantum Physics

submitted to Applied Physics Letters

Scientific paper

10.1063/1.2739308

The strong coupling between an intersubband excitation in a quantum cascade structure and a photonic mode of a planar microcavity has been detected by angle-resolved photovoltaic measurements. A typical anticrossing behavior, with a vacuum-field Rabi splitting of 16 meV at 78K, has been measured, for an intersubband transition at 163 meV. These results show that the strong coupling regime between photons and intersubband excitations can be engineered in a quantum cascade opto-electronic device. They also demonstrate the possibility to perform angle-resolved mid-infrared photodetection and to develop active devices based on intersubband cavity polaritons.

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