Quantum optics of structures with extreme dielectric confinement

M. Ducloy

Gershon Kurizki

Stephen Mark Barnett

Motoaki Bamba, Hajime Ishihara

We construct full quantum theory for optical response of weakly confined excitonic systems with considering exciton dispersion and dielectric structures. It is revealed that confined exciton-polariton makes remarkable influences to entangled-photon generation.

Egon Gross, Dmitri I. Kovalev, Nicolai Kuenzner +4 more

We report on a medium exhibiting extremely efficient light scattering properties: a liquid network formed in a porous matrix. Liquid fragments confined in the solid matrix result in a random fluctuation of the dielectric function and act as scattering objects for photons. The optical scattering efficiency is defined by the filling factor of the liquid in the pores and its dielectric constant. The spectral dependence of the scattering length of photons indicates that the phenomenon is governed by a Mie-type scattering mechanism. The degree of the dielectric disorder of the medium, i.e. the level of opacity is tunable by the ambient vapor pressure of the dielectric substance. In the strongest scattering regime the scattering length of photons is found to be in the micrometer range. By incorporation of dye molecules in the voids of the porous layer a system exhibiting optical gain is realized. In the multiple scattering regime the optical path of diffusively propagating photons is enhanced and light amplification through stimulated emission occurs: a strong intensity enhancement of the dye emission accompanied by significant spectral narrowing is observed above the excitation threshold for a layer being in the opalescence state.

S. Al‐Awfi

The evanescent light field created by total internal reflection at a dielectric-vacuum interface has tight spatial confinement and high local intensity.These properties become more robust when a dual layer of dielectric thin films with different thicknesses is deposited on a planar dielectric surface.Optical construction is promising in nanoscale trapping of absorbed atoms congregating at extreme light field intensity distribution regions on the dielectric surface.Here, we theoretically demonstrate the controllable two-dimensional surface optical lattices based on the evanescent electric field generated by the Hermite-Gaussian light beam.By considering the coupling of lattice to quadrupole-active atomic transitions, we show that the topologies cannot just have high stability, but also the optical potential deep, and thus the dynamic trapping can be governed by changing the design parameters of the optical construction.We expect that this study may contribute to providing another unique method for fabricating spatially complicated two-dimensional nanostructures.