Stephan Smolka

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A major challenge in quantum optics and quantum information technology is to enhance the interaction between single photons and single quantum emitters. This requires highly engineered optical cavities that are inherently sensitive to fabrication imperfections. We have demonstrated a fundamentally different approach in which disorder is used as a resource(More)
Wave propagation in disordered media can be strongly modified by multiple scattering and wave interference. Ultimately, the so-called Andersonlocalized regime is reached when the waves become strongly confined in space. So far, Anderson localization of light has been probed in transmission experiments by measuring the intensity of an external light source(More)
A statistical theory of the coupling between a quantum emitter and Anderson-localized cavity modes is presented based on a dyadic Green's function formalism. The probability of achieving the strong light-matter coupling regime is extracted for an experimentally realistic system composed of InAs quantum dots embedded in a disordered photonic crystal(More)
We investigate the potential of microstructured optical fibers (MOFs) for highly sensitive absorption and fluorescence measurements by infiltrating a dye solution in the holey structure. Generally in a MOF only the evanescent part of the electromagnetic field penetrates into the sample material, providing a weak light-matter interaction. We compare such a(More)
We report on the efficient generation, propagation, and reemission of squeezed long-range surface-plasmon polaritons in a gold waveguide. Squeezed light is used to excite the nonclassical surface-plasmon polaritons, and the reemitted quantum state is fully characterized by complete quantum tomographic reconstruction of the density matrix. We find that the(More)
We present the experimental realization of spatial quantum correlations of photons that are induced by multiple scattering of squeezed light. The quantum correlation relates photons propagating along two different light paths through the random medium and is infinite in range. Both positive and negative spatial quantum correlations are observed when varying(More)
We prove Anderson localization in a disordered photonic crystal waveguide by measuring the ensembleaveraged extinction mean-free path, e, which is controlled by the dispersion in the photon density of states DOS of the photonic crystal waveguide. Except for the very low DOS case, where out-of-plane losses are non-negligible, e can be approximated to be the(More)
Light-matter interaction has played a central role in understanding as well as engineering new states of matter. Reversible coupling of excitons and photons enabled groundbreaking results in condensation and superfluidity of nonequilibrium quasiparticles with a photonic component. We investigated such cavity-polaritons in the presence of a high-mobility(More)
Stephan Smolka,1,* Johan R. Ott,1 Alexander Huck,2 Ulrik L. Andersen,2 and Peter Lodahl3,† 1DTU Fotonik, Department of Photonics Engineering, Technical University of Denmark, Building 345V, 2800 Kgs. Lyngby, Denmark 2DTU Physics, Department of Physics, Technical University of Denmark, Building 309, 2800 Kgs. Lyngby, Denmark 3Niels Bohr Institute, University(More)