NUK - logo
E-viri
Celotno besedilo
Odprti dostop
  • Todorov, Yanko; Aaron Maxwell Andrews; Colombell, Raffaele; De Liberato, Simone; Ciuti, Cristiano; Klang, Pavel; Strasser, Gottfried; Sirtori, Carlo

    arXiv.org, 12/2012
    Paper, Journal Article

    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 of a semiconductor quantum well. We have measured a splitting between the coupled modes that amounts to 48% of the energy transition, the highest ratio ever observed in a light-matter coupled system. Our analysis, based on a microscopic quantum theory, shows that the nonlinear polariton splitting, a signature of this regime, is a dynamical effect arising from the self-interaction of the collective electronic polarization with its own emitted field.