Abstract

The strong light-matter coupling is an exotic phenomenon of interest not only for basic physics, but also because it has potential for improving optoelectronic devices. When dealing with conduction band electrons in semiconductor quantum wells (QWs), intersubband (ISB) transitions can couple to the optical resonances of plasmonic antennas. In the case of strong light-matter coupling, a characteristic anticrossing of the "light" and "matter" excitations is observed. It stems from the appearance of new eigenmodes, called cavity polaritons.

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