6814 Suchergebnisse für: „“
Multimode interference in outer cladding large-core, air-clad photonic crystal fibre
It is described a large-core air-clad photonic crystal fibre-based sensing structure using the outer cladding as a light guide which is highly sensitive to refractive index. The sensing head is based on...
PublikationenFabry-Pérot Cavity Based on a Diaphragm-Free Hollow-Core Silica Tube
A Fabry-Pérot cavity of simple design and based on a pure silica diaphragm-free hollow tube is proposed. Its operation is based on a first reflection of light at the end of the single mode fiber that...
PublikationenSimultaneous Measurement of Curvature and Strain using a Suspended Multicore Fiber
A suspended multicore fiber sensor for simultaneous measurement of curvature and strain is proposed. The spectral response shows evidences of several interferences arising from the seven cores of the fiber....
PublikationenInfluence of Fiber Orientation on Femtosecond Bragg Grating Inscription in Pure Silica Microstructured Optical Fibers
We studied the influence of the fiber orientation on the growth of fiber Bragg gratings (FBGs) in pure silica microstructured optical fibers (MOFs) during femtosecond UV laser inscription. To do so we...
PublikationenFirst comparison of electric field induced second harmonic of near-infrared femtosecond laser pulses in reflection and transmission generated from Si/SiO2 interfaces of a silicon membrane
For the first time electric field induced second harmonic (EFISH) generation of femtosecond (fs) laser pulses (λ = 800 nm, τ = 75 ± 5 fs, rep. rate = 80 MHz, E≤ 10 nJ) is observed in transmission...
PublikationenSputtered Amorphous Silicon Thin Films for Diode Laser Crystallization
Multicrystalline silicon thin films with large grains (100 µm) on glass are useful for thin film solar cells and for thin film transistors. These films can be prepared by diode laser irradiation of amorphous...
PublikationenCharacterization of Grain Boundary Geometry in the TEM, exemplified in Si thin films
It has been long observed that phenomena associated with grain boundaries (GB) in metals (e.g. corrosion, energy, segregation, etc) are influenced by the grain boundary geometry. For many years the coincidence...
PublikationenSelf-catalyzed, vertically aligned GaN rod-structures by metal-organic vapor phase epitaxy
This paper will discuss the influence of parameters such as temperature, V/III ratio, atmosphere and pressure on the vertical growth of GaN rod-structures on sapphire by metalorganic vapor phase epitaxy....
PublikationenTowards local growth of individual nanowires on 3D microstructures by using a minimally-invasive catalyst templating method
We present a novel minimally invasive post-processing method for catalyst templating based on focused charged particle beam structuring, which enables a localized Vapor-Liquid-Solid (VLS) growth of individual...
PublikationenA precise optical determination of nanoscale diameters of semiconductor nanowires
Electrical and optical properties of semiconducting nanowires (NWs) strongly depend on their diameters. Therefore, a precise knowledge of their diameters is essential for any kind of device integration....
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