We present a system able to discriminate pulses according their duration with potential applications in all-optical signal multiplexing. The device is based on directional coupler nonlinear cores and metallic claddings dimensions nanometric scale. Simulations are carried out using the FDTD technique for ultrashort of femtosecond order. It shown that separate such respect time-width threshold wh...

Recent advances in topologically robust waveguiding for electromagnetic systems have presented opportunities improving practical photonic and microwave devices. To bring this rich area of physics within the reach application, it is critical such to be interfaced with classical, continuous waveguiding, transmission line technology. This Letter presents a compact, highly efficient transition from...

Higher-Order-Modes (HOMs) may affect beam stability and refrigeration requirements of superconducting proton linacs such as the SPL, which is studied at CERN as the driver for future neutrino facilities. In order to limit beaminduced HOM effects, CERN considers the use of HOM couplers on the cut-off tubes of the 5-cell superconducting cavities. These couplers consist of resonant antennas shaped...

Devices formed from magneto-inductive waveguides based on coupled loop resonators are considered using simple analytic theory, initially assuming lossless propagation and nearestneighbour coupling. Two-port devices that were considered include mirrors, Fabry–Perot resonators, Bragg gratings and tapers, while more general N-port devices include power splitters and directional couplers. Condition...

The aim of the presented investigations was to develop a technique of producing Bragg's gratings on planar waveguides for their application in acoustooptic structures. Waveguides are obtained by means of the sol-gel technology and they are deposited on piezoelectric plates. The introduction of a beam of light into the structure of the waveguide is in the case of planar or strip optical systems ...

Silicon-based solar cells (SCs) promise to be an alternative energy source mainly due to: (1) a high efficiency-to-cost ratio, (2) the absence of environmentaldegradation issues, and (3) great reliability. Transition from wafer-based to thin-film SC significantly reduces the cost of SCs, including the cost from the material itself and the fabrication process. However, as the thickness of the ab...

In this paper we study the impact of elliptically-deformed features such as cladding air-holes and elliptically-modulated cores, as ingredients for optimizing the coupling characteristics of dual-core fluorine-doped photonic crystal fiber (PCF) couplers. We provide a detailed numerical investigation by using a trial and error approach for optimizing the propagation characteristics of fluorine-d...

We describe the modeling and fabrication of waveguide grating couplers with theoretical outcoupling efficiencies into a single diffracted order nearing 100%. Termed single leakage-channel grating couplers (or SLCGC's), these devices utilize a high-reflectivity dielectric stack to reflect the outcoupled beam diffracted toward the substrate and back up into the air region, where it constructively...

*Correspondence: [email protected] JARA Institute for Quantum Information, RWTH Aachen University, Aachen, 52056, Germany Abstract Most quantum computing architectures can be realized as two-dimensional lattices of qubits that interact with each other. We take transmon qubits and transmission line resonators as promising candidates for qubits and couplers; we use them as bas...