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Strathprints serves world leading Open Access research by the University of Strathclyde, including research by the Strathclyde Institute of Pharmacy and Biomedical Sciences (SIPBS), where research centres such as the Industrial Biotechnology Innovation Centre (IBioIC), the Cancer Research UK Formulation Unit, SeaBioTech and the Centre for Biophotonics are based.

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Dependence of the e 2 and a1(LO) modes on InN fraction in InGaN epilayers

Hernandez, S. and Cusco, R. and Artus, L. and O'Donnell, K.P. and Martin, R.W. and Watson, I.M. and Nanishi, Y. and Kurouchi, M. and van der Stricht, W. (2004) Dependence of the e 2 and a1(LO) modes on InN fraction in InGaN epilayers. MRS Online Proceedings Library, 831. ISSN 0272-9172

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Abstract

The behavior of the E2 and A1(LO) optical phonons in Inx Ga1-x N has been analyzed by Raman scattering over the whole composition range. The frequencies of the E2 and A1(LO) modes decrease with increasing InN fraction. These modes display a significant broadening for an InN fraction of ≈ 60% and their linewidth decreases towards both ends of the composition range as a consequence of reduced cation disorder. Our results show a one-mode behavior for both E2 and A1(LO) modes of InGaN.