6814 Suchergebnisse für: „“

Inscription and characterization of Bragg gratings in single-crystal sapphire optical fibres for high-temperature sensor applications

We report the fabrication and high-temperature characteristics of Bragg gratings in single-crystal sapphire fibres inscribed by infrared femtosecond laser pulses. For stable read-out of the multimode...

Sub-micrometer-sized, cross-type Nb-AlOx-Nb tunnel junctions with low parasitic capacitance

We report on a technology for the fabrication of sub-micrometer sized cross-type Josephson tunnel junctions in niobium technology. We present the fabrication scheme and properties of cross-type junctions...

Strong Coupling of a Quantum Oscillator to a Flux Qubit at Its Symmetry Point

A flux qubit biased at its symmetry point shows a minimum in the energy splitting (the gap), providing protection against flux noise. We have fabricated a qubit of which the gap can be tuned fast and have...

Packed domain Rayleigh-Sommerfeld wavefield propagation for large targets

A micro-structured aperture made of a hollow triangular-core fiber for novel beam shaping

We demonstrate a micro-structured aperture made of a unique hollow triangular-core fiber (HTCF) that consists of a central air hole, a high-index hollow triangular core, and silica cladding for all-fiber...

Non-phase-matched tunable band rejection in an all-solid photonic bandgap fiber with high-index rods on graded-index pedestals

Generation of flattop pump pulses for OPCPA by coherent pulse stacking with fiber Bragg gratings

We present a simple and robust pulse shaping device based on coherent pulse stacking. The device is embedded in a polarisation maintaining step index fiber. An input pulse is sent through a fiber optical...

Validity limits of the Neel relaxation model of magnetic nanoparticles for hyperthermia

The derivation of the optimum mean diameter of magnetic nanoparticles (MNP) for hyperthermia as a tumour therapy in the literature is commonly reduced to application of the N´eel relaxation model. Serious...

Nonlinear photonic crystal fiber with a structured multi-component glass core for four-wave mixing and supercontinuum generation

We report about a new type of nonlinear photonic crystal fibers allowing broadband four-wave mixing and supercontinuum generation. The microstructured optical fiber has a structured core consisting of...

Covalent Attachment of Alkyl Functionality to 50 nm Silicon Nanowires through a Chlorination/Alkylation Process

For many applications, the presence of oxide on Si nanowires (Si NWs) is undesirable because of the difficulty in controlling the SiO2/Si interface properties. Here, we report on the functionalization...