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Among the most prominent effects resulting from nonlinear light–matter interaction is the generation of correlated and entangled photons through various processes, notably via spontaneous parametric down‐conversion or spontaneous four‐wave mixing. Such nonlinear optical processes benefit from the concentration of electromagnetic fields in small volumes. Dielectric nanoresonators and their 2D layouts—metasurfaces—provide...
We suggest and demonstrate experimentally AlGaAs nanoantennas for efficient second-harmonic generation (SHG). We show that the SHG directionality and efficiency are defined by either electric or magnetic multipoles and controlled by incident polarization and design.
We suggest and realize experimentally dielectric metasurfaces with high transmission efficiency for quantum multi-photon tomography, allowing for full reconstruction of pure or mixed quantum polarization states across a broad bandwidth.
We employ the generalized Huygens principle to design and fabricate highly transparent dielectric metasurfaces for complex wavefront manipulation with 99% polarization conversion and 99% diffraction efficiencies and broadband operation at telecom wavelengths.
A nonlinear mirror based on the nonlinear optical frequency conversion has been established as a universal tool for ultrafast control of laser dynamics [1]. However, traditional approaches are based on bulk crystals posing major difficulties on phase matching and alignment. Ultra-thin nonlinear mirrors based on all-dielectric metasurfaces would offer a major breakthrough to develop this concept [2-4]...
Measurements of quantum states of photons are conventionally performed with series of optical elements in bulk setups [1] or optical chips incorporating multiple tunable beam splitters. Here, we suggest and develop experimentally, for the first time to our knowledge, a new concept of quantum-polarization measurements with a single all-dielectric resonant metasurface [2]. The operating principle is...
Metasurfaces are ultra-thin patterned structures that emerged recently as planar metadevices [1] capable of reshaping and controlling incident light. Many designs and functionalities of metasurfaces suggested so far, are based largely on plasmonic planar structures, however most of these metasurfaces demonstrate low efficiencies in transmission due to losses in their metallic components. In contrast,...
We experimentally demonstrate spin-polarized light emission from quantum dots coupled to a single-element metamaterial nanoparticle with resonant multipolar moments. We observe spin-momentum locking resulting in photons of opposite spin emitted in opposite directions.
We study experimentally and theoretically oblique incidence polarization phenomena for periodic metasurfaces of different symmetries. We show that the strength of the optical activity, circular dichroism and asymmetric transmission is dependent on the rotational symmetry of the metasurface lattice. We verify the predictions of the analytical model by the experimental study of optical metasurfaces...
We experimentally demonstrate spin-polarized light emission from quantum dots coupled to a single-element nanoantenna with resonant multipolar moments. We observe spin-momentum locking resulting in photons of opposite spin emitted in opposite directions.
We compare, both experimentally and theoretically, metamaterials with three different symmetries: square lattice, hexagonal lattice, and quasicrystalline Penrose tiling. By relying on an advanced Jones calculus, we link the symmetry properties to the far-field optical response, such as ellipticity and circular dichroism, as the incident angle is varied. We show that hexagonal lattice metamaterials,...
We develop a systematic procedure for deriving the coupled-mode equations describing the spatial evolution of the slowly-varying amplitudes of electromagnetic modes in nonlinear periodic structures with loss and gain. Our approach is rigorously based on the Lorentz reciprocity theorem, and therefore it can be applied to a broad range of structures with metal and dielectric non-magnetic components,...
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