Journal
PHYSICAL REVIEW LETTERS
Volume 105, Issue 19, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.105.196402
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Funding
- French National Research Agency [ANR-05-NANO-049]
- Austrian Science Fund (FWF)
- Austrian Science Fund (FWF) [F 2503] Funding Source: researchfish
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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.
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