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1. Bismide Semiconductors: Revolutionising Telecom Lasers

   19 Oct 2015 | | Contributor(s):: Muhammad Usman, Christopher A Broderick, Eoin P O\'reilly

   Today’s telecomm lasers are plagued with Auger-related losses, which significantly reduce their efficiency and make device cooling essential. We are proposing a radical change in the laser technology by developing a new class of materials, bismide semiconductors. These novel nanomaterials...

2. Electronic Structure Theory of Dilute Impurity Alloys: GaBiP and GaBiAs

   18 Jan 2013 | | Contributor(s):: M. Usman

   We report an atomistic model established for electronic structure calculations of GaBiAs (0 < Bi < 12%) alloys based on empirical tight binding parameters. Alloy supercells consisting of 1000 and 8000 atoms are relaxed using valence force field (VFF) method, including anharmonic corrections to...