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Now showing items 1071-1080 of 2111
Photovoltage from ferroelectric domain walls in BiFeO3
(2020)
We calculate the component of the photovoltage in bismuth ferrite that is generated by ferroelectric domain walls, using first-principles methods, in order to compare its magnitude to the experimentally measured photovoltage. ...
Magnetocrystalline anisotropy and exchange probed by high-field anomalous Hall effect in fully compensated half-metallic Mn2RuxGa thin films
(2018)
Magnetotransport is investigated in thin films of the half-metallic ferrimagnet Mn2RuxGa in pulsed magnetic fields of up to 58 T. A nonvanishing Hall signal is observed over a broad temperature range, spanning the compensation ...
Optical design of GaN resonant cavity LEDs emitting at 510 nm for use in plastic optical fibre applications
(2003)
The optimized optical design of GaN resonant cavity light emitting didoes (RCLEDs) emitting at 510nm for maximum
extraction efficiency into numerical apertures (NAs) of 1.0 (total emission) and 0.5 (typical plastic optical ...
Reflectance anisotropy spectroscopy of Si(111)-(3×1)Li and Ag surfaces
(2013)
The Si(111)-(3?1)Li and Ag surface structures consist of Si honeycomb chains separated by channels occupied by Li or Ag atoms. The dimerization of neighboring Ag atoms results in a larger c(12?2)Ag superstructure. We report ...
Optical properties of Mo6S3I6 nanowires
(2007)
Optical reflectivity and absorbance measurements of oriented Mo6S3I6 nanowire thin films and dispersions in different solvents are presented extending from the far infrared to the ultraviolet. In spite of the highly ...
Planar elliptical solid immersion lens based on a Cartesian oval
(2013)
We report on the design of a single element planar solid immersion lens which is theoretically capable of confining light to a focal spot with full width half maximum of 0.29 λ (154 nm at λ = 532 nm) and achieving an ...
Growth and electrical characterisation of conjugated polymer nanostructures
(Trinity College (Dublin, Ireland). School of Physics, 2011)
The field of conductive polymers is one in which there has been much interest in the last
number of years. Two of the most common conductive polymers, polypyrrole and poly(p-phenylene vinylene) are investigated in the ...
Oxidation of W(110) studied by LEED and STM
(2010)
The oxidation of W(110) was studied over a temperature a range of 1000 K to 1600 K at 1x10-6 Torr oxygen. The subsequent oxide structure was then characterized using Low Energy Electron Di_raction (LEED) and Scanning ...
Optical characterisation and manipulation of active microspheres
(Trinity College (Dublin, Ireland). School of Physics, 2007)
Spherical microcavities are of great interest for both photonic applications and for
fundamental physics. In this thesis, a novel active dielectric microsphere emitter coated
with colloidal CdTe nanocrystals is studied. ...