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In contrast to popular belief, it is possible to simulate a relativistic Dirac equation in classical paraxial optical waveguide arrays. Here, we present various simulations of relativistic phenomena in different structures, including so-called “optical graphene”.
We show theoretically and experimentally that photonic lattices constructed from random components residing on a ring in momentum space are amorphous, yet they exhibit a bandgap, and support linear and nonlinear defect-state guidance.
We report the first observation of classical Bloch-like oscillations and revivals of light in a new class of dynamic optical systems-the so-called Glauber-Fock oscillator lattices.
We here report about subwavelength metallic aperture on infinite plane acting as polarization analyzers for magnetic field following Bethe's diffraction, analogous to conventional polarizers determining the electric field direction.
We theoretically and experimentally demonstrate that transverse instability of soliton stripes can be greatly suppressed when the solitons propagate in a 1D lattice under self-defocusing nonlinearity.
We report on the optical measurement of the backscattering matrix in a weakly scattering medium. A decomposition of the time reversal operator allows selective and efficient focusing on individual scatterers, even through an aberrating layer.
We show that full compensation of loss in plasmonic waveguides with significantly sub-wavelength light confinement (less than λ/4n) requires current density in excess of 100 kA/cm2 making sub-wavelength in all three dimensions laser (spaser) impractical.
We present the dynamical creation of electron-positron pairs due the instability of the quantum vacuum. We observed this effect in an optical model system which is an array fabricated by femtosecond laser direct inscription.
We have derived an efficient model that allows calculating the dynamical single-photon absorption of an emitter coupled to a waveguide. We suggest a novel and simple structure that leads to strong single-photon absorption.
Single-mode lasing at ∼628 nm above an absorbed pump power threshold of 67.5 μW, tunable within a 2.1-nm range (30% of the free-spectral-range) was obtained from colloidal CdSe/CdS core/shell nanorods on whispering-gallery-mode silica microspheres.
We demonstrate nonlinear frequency conversion in hydrogenated amorphous silicon (a-Si:H) with conversion efficiency of −13dB at telecommunication data rates. Conversion bandwidths of 150nm are measured in CW regime at telecommunication wavelengths.
We show a reduction of spontaneous Raman scattering in chalcogenide at 77 K, which improves the photon statistics of correlated pair generation only in the frequency range close to the pump (Δf < 3 THz).
We present a polarization-entangled photon pair source fully integrated on a silicon photonic circuit. Using two silicon wire waveguides connected with a silicon polarization rotator, we demonstrate a generation of polarization-entangled photons.
We present the high efficient generation of narrow-band heralded single photons, widely tunable in wavelength and bandwidth using resonator enhanced spontaneous down conversion in a crystalline whispering gallery mode resonator.
Reversed pyramidal GaAs microcavities with embedded InAs quantum dots have been fabricated, in order to prove their potential for highly efficient single-photon emitters. Contacted via tiny bridges, they have been driven optically and electrically.
We demonstrate a reconfigurable quantum photonic circuit with eight phase shifters. We use this device to generate and characterise maximally entangled two-qubit states, violate Bell inequalities, and generate single-photon mixed states.
For a single quantum dot under excitation with short electrical pulses the dependence of the photon anti-bunching on pulse width and excitation strength is studied in a theory-experiment collaboration.
We present measurements on electrically generated photons from a quantum dot in an LED structure, showing high entanglement fidelity and two-photon interference visibility, both necessary requirements for scalable quantum communication and logic.
We report the first observation of Anderson co-localization of spatially entangled photon pairs propagating through random optical waveguide lattices with controllable off-diagonal disorder.
We report surface plasmon polariton (SPP) mediated Raman microscopy on dielectric films in contact with a Ag layer at 785 nm with spatial resolution approaching the optical diffraction limit and reasonable spectral acquisition times.
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