Optical metasurfaces open new avenues for precise wavefront control of light integrated quantum technology. Here, we demonstrate a hybrid photonic system that is capable to entangle and disentangle two-photon spin states at dielectric metasurface. By interfering single-photon pairs nanostructured metasurface, path-entangled NOON state with circular polarization generated exhibits HOM interference visibility 86 $\pm$ 4%. Furthermore, nonclassicality phase sensitivity in metasurface-based...

TiAlN/AlN multilayers are attracting great interest for the possibility to modulate their mechanical and tribological properties through variation of multilayer design. In this work TiAlN single layer, intermixed-multilayer nano-multilayer were prepared using a reactive magnetron sputtering system starting from targets TiAl Al. The aim is analyze how design affects thermal coatings. microstructure as-deposited annealed films has been studied X-ray diffraction. chemical composition deduced by...

Counter-propagating parametric conversion processes in non-linear bulk crystals have been shown to feature unique properties for efficient narrowband frequency conversion. In quantum optics, the generation of photon pairs with a counter-propagating down-conversion process (PDC) waveguide, where signal and idler photons propagate opposite directions, offers material-independent engineering capabilities. However, realizing PDC necessitates quasi-phase-matching (QPM) extremely short poling...

Interferometers provide a highly sensitive means to investigate and exploit the coherence properties of light in metrology applications. However, interferometers come various forms different optical states within. In this paper, we introduce classification scheme that characterizes any interferometer based on number involved nonlinear elements by studying their influence single-photon photon-pair states. Several examples specific from these more general classes are discussed, theory...

In the past few decades, ZrN thin films have been identified as wear resistant coatings for tribological applications. The mechanical and properties of layers depend on internal stress induced by adopted deposition techniques parameters such pressure, temperature, growth rate. sputtering processes, selected target voltage waveform plasma characteristics also play a crucial influence physical produced coatings. present work, films, obtained setting different values duty cycle in reactive...

Evolving photonic quantum technologies and applications require higher rates of single photon generation. In parallel, it is required that these generated photons are kept spectrally pure for multi-photon experiments noise be to a minimum. spontaneous parametric down-conversion sources, requirements conflicting, because spectral filtering increase purity always means lowering the rate at which generated, increasing pump power noise. this paper, we present scheme, called extended heralding,...

The distribution of entangled quantum systems among two or more nodes a network is key task at the basis communication, computation and cryptography. Unfortunately transmission lines used in this procedure can introduce so much perturbations noise transmitted signal that prevent possibility restoring correlations received messages either by means encoding optimization exploiting local operations classical communication. In work we present which allows one to improve performance some these...

We report a bulk optics experiment demonstrating the possibility of restoring entanglement distribution through noisy quantum channels by inserting suitable unitary operation (filter) in middle transmission process. focus on two relevant classes single-qubit consisting repeated applications rotated phase damping or amplitude maps, both modeling combined Hamiltonian and dissipative dynamics polarization state single photons. Our results show that interposing filter between can significantly...

ZnO – SiO 2 nanocomposites were synthesized by ion implanting a Zn+ beam in silica slide and annealing oxidizing atmosphere at 800 °C. A detailed structural optical characterization was performed using glancing incidence x-ray diffraction, transmission electron microscopy combined with selected area diffraction energy dispersive spectrometry, absorption, photoluminescence spectroscopies. Samples obtained three different fluences the range 1–2×1017 ions/cm2 have been investigated. According...

Nanoparticles of tin dioxide embedded in silica matrix were synthesized by ion implanting a Sn+ beam slide and annealing oxidizing atmosphere at 800 °C. A detailed structural optical characterization was performed using glancing incidence x-ray diffraction, transmission electron microscopy, absorption, photoluminescence spectroscopies. Metallic tetragonal β-tin crystalline nanoparticles formed the as-implanted sample. The promotes total oxidation with preferential migration toward surface...

Interference between single photons is key for many quantum optics experiments and applications in technologies, such as communication or computation. It advantageous to operate the systems at telecommunication wavelengths integrate setups these order improve stability, compactness scalability. A new promising material platform integrated lithium niobate on insulator (LNOI). Here, we realise Hong-Ou-Mandel (HOM) interference telecom from an engineered parametric down-conversion source LNOI...

Ion irradiation of polymers has become a wide field attracting much interest for the fabrication novel hybrid materials with excellent physical properties technological applications [1]-[2]. In this work, we report on implantation Cr+ and Pd+ ions in inert order to promote formation dispersed metal nanoparticles or continuous thin film below polymer surface. To purpose, different thermoplastic polymers, Polymethylmetacrylate (PMMA), Polypropylene (PP), Polycarbonate (PC) Polyethylene...

Interference between two waves is fundamentally driven by the coherence, an intrinsic property of waves. The classical coherence fields then defines degree first-order as quantified their cross-correlation function. Here, we study properties various interferometer configurations, spanning from linear over semi-nonlinear to fully nonlinear settings [1] – [3] .

Pd + ions (90 keV) were implanted at normal incidence and room temperature in different highly insulating (>200 GΩ) thermoplastic polymers (poly(methyl methacrylate), polypropylene, polyethylene terephthalate glycol-modified, polycarbonate). At high fluence optimized process parameters, the ion implantation gives rise to formation of a nanocomposite thin surface layer constituted by nanoclusters carbonaceous material (nanographite/amorphous carbon). The morphological, microstructural,...

The purpose of this study has been to investigate the effects TiAlN functional coatings in cryo-tribological pin-on-disk experiments. Nowadays, introduction new machining technologies for chip removal, both at high speed and cryogenic conditions, is posing challenges opening horizons research. As a matter fact, that technology needs focus on choice workpiece materials be tools used. For latter, wear phenomenon studied employing pins-on-disk (made by nickel-based alloys) under liquid nitrogen...

A technique to determine the optimal design of an FDM-FM communications link considering both dollar cost and system performance is established. The four major items a system, transmitter, receiver, transmitting antenna, receiving are considered be stages serial-multistage with signal-to-noise power ratio as final boundary value threshold constraint. For eyery combination equipment items, rms channel modulation index computed, which for median constraint minimizes required received carrier...

We design, fabricate, and characterise a balanced directional coupler in lithium niobate on insulator (LNOI) use it to demonstrate Hong-Ou-Mandel interference of telecom photons with raw visibility (93.5±0.7) %.