Room temperature terahertz polariton emitter

Details Room temperature terahertz polariton emitter Room temperature terahertz polariton emitter

2012-01-09

arxiv.org/abs/1201.2094v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

Scientific paper

The strong-coupling regime between an electronic transition and the photonic mode of a optical resonator manifests itself in the lifting of the degeneracy between the two modes and the creation of two polariton states with mixed optical and electronic character. This phenomenon has been studied in atoms, excitons in semiconductors and quantum electrodynamics circuits based on Josephson junctions. Recently, there is also strong interest to study similar e?ects using intersubband transitions in quantum wells in the terahertz, where the ultra strong coupling regime can be reached and new physical e?ects have been predicted. An other interesting feature of this system is that, in contrast to systems based on superconductors, the ultra strong coupling regime can be maintained up to room temperature. In this work, we demonstrate that parabolic quantum wells coupled to LC circuit resonators in the ultra strong coupling regime can achieve terahertz emission up to room temperature.

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