Ultrastrong light-matter coupling regime with polariton dots.

摘要: The regime of ultrastrong light-matter interaction has been investigated theoretically and experimentally, using zero-dimensional electromagnetic resonators coupled with an electronic transition between two confined states a semiconductor quantum well. We have measured splitting the modes that amounts to 48% energy transition, highest ratio ever observed in system. Our analysis, based on microscopic theory, shows nonlinear polariton splitting, signature this regime, is dynamical effect arising from self-interaction collective polarization its own emitted field.