Dressed photons in a nonlinear Fabry-P´erot cavity

摘要

The photo-polaron in a two-dimensional optical microcavity is investigated within the framework of quantumnstatistical mechanics. Our experimental setup is based on a planar Fabry-P´erot cavity filled with a nonlinearnnonpolar crystal. The Fabry-P´erot cavity provides a chemical potential and an effective mass for a photon,nmaking the system formally equivalent to a two-dimensional gas of number-conserving, massive bosons. Thenincident photons interact with the Raman phonons in the crystal and hence are converted into quasiparticles,nwhichwe refer to as photo-polarons.Aphoto-polaron is a photon dressedwith a cloud of virtual transverse-opticalnphonons, namely, the dressed photon. One of the most important properties of photo-polaron is an increased inertnmass. Because of the effect of photo-polarons, we find that the photon-photon interaction is enhanced greatly. Thenphoto-polaron is a quantum effect of cavity nonlinear optics but its increased inert mass is a classical property.