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Now showing items 291-300 of 2110
Conservation of angular momentum in ultrafast spin dynamics
(2022)
The total angular momentum of a closed system is a conserved quantity, which should remain constant in time for any excitation experiment once the pumping signal has been extinguished. Such conservation, however, is never ...
Multi-species gas sensing using monolithic widely tuneable laser diodes
(SPIE, 2005)
Widely tuneable laser diodes operating in the 1520 ? ? ? 1570 nm are characterised and compared for use as sources for
tuneable laser diode gas absorption spectroscopy. Three gases hydrogen cyanide, ammonia and acetylene ...
Hybrid metal nanostructure arrays for colour printing
(2016)
Nanoscale metasurfaces have become an area of growing interest in recent years with the promise of new functionalities. One area that has received a lot of attention is sub-diffraction limit printing. We demonstrate the ...
Boron diffusion in magnetic tunnel junctions with MgO (001) barriers and CoFeB electrodes
(2010)
Boron diffusion out of the CoFeB layers in model systems with thick CoFeB and MgO layers grown by radiofrequency sputtering or electron-beam evaporation and in MgO-based magnetic tunnel junctions (MTJs) is probed after ...
Plasmon-enhanced nonradiative energy transfer in a hybrid quantum well structure
(2015)
Three different silver metal nanobox arrays are used to demonstrate plasmon-enhanced non-radiative energy transfer from an InGaN/GaN quantum well to a ~80 nm thick layer of CdSe/ZnS quantum dots ...
Hole blocking in carbon nanotube-polymer composite organic light-emitting diodes based on poly (m-phenylene vinylene-co-2, 5-dioctoxy-p-phenylene vinylene)
(2000)
In order to investigate the role of carbon nanotubes in a polymer matrix, organic light-emitting
diodes were fabricated from a polymer composite composed of poly
~
m
-phenylene
vinylene-co-2,5-dioctoxy-
p
-phenyle ...
Effect of insertion layer on electrode properties in magnetic tunnel junctions with a zero-moment half-metal
(2019)
Due to its negligible spontaneous magnetization, high spin polarization and giant perpendicular
magnetic anisotropy, Mn2RuxGa (MRG) is an ideal candidate as an oscillating layer in THz spin-transfertorque nano-oscillators. ...
Phase-locking in quantum and classical oscillators: polariton condensates, lasers, and arrays of Josephson junctions
(2003)
We connect three phenomena in which a coherent electromagnetic field could be generated: polariton
condensation, phase-locking in arrays of underdamped Josephson junctions, and lasing. All
these phenomena have been ...
Cost & Capability Compromises in STEM Instrumentation for Low-Voltage Imaging
(2022)
When characterising beam-sensitive materials in the scanning transmission electron microscope (STEM), low-
dose techniques are essential for the reliable observation of samples in their true state. A simple route to
minimise ...