6814 Suchergebnisse für: „“

In situ FBG inscription during fiber laser operation

We demonstrate the inscription of a 266 nm UV femtosecond pulse-induced fiber Bragg grating (FBG) in an Yb-doped fiber during optical pumping at 976 nm and the initiation of lasing with increasing grating...

Optical activity in sub-wavelength metallic grids and fishnet metamaterials in the conical mount

We report on measurements of optical activity in reflection from plasmonic crystals consisting of a sub-wavelength silver meshed grid and a fishnet metamaterial in the conical mount. The fishnet metamaterials,...

High quality factor whispering gallery modes from self-assembled hexagonal GaN rods grown by metal-organic vapor phase epitaxy

Self-assembled GaN rods were grown on sapphire by metalorganic vapor phase epitaxy using a simple two-step method that relies first on a nitridation step followed by GaN epitaxy. The mask-free rods formed...

Processing and Oxygenation of YBaCuO Melted Textured Ceramics at High and Enhanced Pressures and Temperatures

It has been established that the oxygenation of the structure of YBa2Cu3O7–δ (Y123) textured ceramic materials under elevated pressure (up to 10–16 MPa) and high temperatures (700–900°C) for a...

Fabrications of Fiber Bragg Gratings Written inPhotonic Crystal Fibers

We report a two-beam interference method employing a femtosecond or excimer laser to write fiber Bragg gratings in the pure-silica and Ge-doped photonic crystal fibers (PCFs). The effects of the H2-loading...

LOTOS-based two-photon calcium imaging of dendritic spines in vivo

Neurons in the mammalian brain receive thousands of synaptic inputs on their dendrites. In many types of neurons, such as cortical pyramidal neurons, excitatory synapses are formed on fine dendritic protrusions...

Application of Absorbance Imaging to Brethertons Problem – 3D Droplet Shape Analysis in Glass Micro Channels

Absorbance imaging is applied to measure the 3D shape of liquid droplets in isotropically etched linear micro channels. The pressure drop due to the deformation of the droplet interfaces was derived directly...

Acoustically switchable droplet ring resonators for droplet-based microfluidics

In our contribution we report on the development of a novel microfluidic operation unit for acoustically actuated resonance-based droplet sorting and stacking – a microfluidic ring resonator. Key element...

Biomedical Vibrational Spectroscopy: Editorial

Chip-basiertes Detektionssystem für den Vor-Ort-Nachweis von Tierseuchen

The proceeding global trade of live stock increases the risk of spreading animal diseases and other pathogens, so diagnostic methods and tools are needed that enable fast on-site analysis. These novel...