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A. D. Pitt
Researcher at Defence Research Agency
Publications - 4
Citations - 310
A. D. Pitt is an academic researcher from Defence Research Agency. The author has contributed to research in topics: Ellipsometry & Quantum dot. The author has an hindex of 4, co-authored 4 publications receiving 308 citations.
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Journal ArticleDOI
Near‐band‐gap photoluminescence from pseudomorphic Si1−xGex single layers on silicon
TL;DR: In this article, an analytical expression for the exciton energy gap at 4.2 K valid for x < 0.24 was derived from the no-phonon line energies: ESX(x) = 1.155−0.874x+0.376x2 eV.
Journal ArticleDOI
Spectroscopic ellipsometry characterization of strained and relaxed Si1-xGex epitaxial layers
TL;DR: In this paper, the authors used spectroscopic ellipsometry to study thin and thick, relaxed and thin, strained epilayers of Si1−xGex on Si in the range 0.1
Journal ArticleDOI
Spectroscopic ellipsometry of Si1−xGex epilayers of arbitrary composition 0≤x≤0.255
TL;DR: In this article, the critical point (CP) transition energies for strained Si1−xGex (0≤x≤0.255) between 2.5 and 3.5 eV from Lorentzian fits to the second differential of reference dielectric function spectra were calculated.
Journal ArticleDOI
Spectroscopic ellipsometry of Si1-xGex multi-quantum wells
R. T. Carline,C. Pickering,P. Calcott,D.J. Robbins,W.Y. Leong,A. D. Pitt,S. J. Barnett,A. G. Cullis +7 more
TL;DR: In this paper, the authors used spectroscopic ellipsometry (SE) to characterise a range of strained Si 1-x Ge x /Si multi-quantum well (MQW) samples.