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Now showing items 41-48 of 48
Model of impurity segregation in graphene nanoribbons
(2009)
The electronic properties of low-dimensional materials can be engineered by doping, but in the case of
graphene nanoribbons GNRs the proximity of two symmetry-breaking edges introduces an additional dependence
on the ...
MgN: a new promising material for spintronic applications
(2009)
We present rocksalt MgN as a
d
0
magnet with potential for spintronics applications. Our density-functional
theory calculations demonstrate that rocksalt MgN is at the verge of half-metallicity, with an electronic ...
Structure of Si(111)-In Nanowires Determined from the Midinfrared Optical Response
(2009)
The anisotropic optical response of Si(111)-(4?1)/(8?2)-In in the midinfrared, where ab initio studies predict significant changes in the band structure between competing models of this important quasi-1D system, has been ...
Novel design for noise controlled semiconductor optical amplifier
(2009)
The use of semiconductor optical amplifiers (SOA) in optical communications networks has so far been limited due to their inherent large noise figure (NF) compared to Erbium Doped Fibre Amplifiers. Therefore improvement ...
High-Speed Chromatic Dispersion Monitoring of a Two-Channel WDM System using a single TPA Microcavity
(IEEE Lasers and Electro-Optics Society, 2008)
Chromatic dispersion monitoring of two 160Gb/s wavelength channels using a TPA
Microcavity is presented. As the microcavity exhibits a wavelength resonance characteristic, a
single device could monitor a number of different ...
All-optical pulse processing for advanced photonic communication system
(IEEE, 2008)
This paper investigates the use of a Two-Photon Absorption photodetector for high speed processing of ultrashort
optical pulses in advanced photonic communication systems. Specifically the paper describes how the
Two-Photon ...
Interface and transport properties of Fe/V/MgO/Fe and Fe/V/Fe/MgO/Fe magnetic tunneling junctions
(2009)
The interface and transport properties of Fe/V/MgO/Fe and Fe/V/Fe/MgO/Fe magnetic tunneling junctions
are investigated by using density-functional theory and nonequilibrium Green?s-function methods. Bader
analysis reveals ...
Electron transport across electrically switchable magnetic molecules
(2009)
We investigate the electron-transport properties of a model magnetic molecule formed by two magnetic
centers whose exchange coupling can be altered with a longitudinal electric field. In general, we find a negative
differential ...