UV Raman Study of A 1 (LO) and E 2 Phonons in InGaN Alloys Grown by Metal-Organic Chemical Vapor Deposition on (0001) Sa

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UV RAMAN STUDY OF A1(LO) AND E2 PHONONS IN InGaN ALLOYS GROWN BY METAL-ORGANIC CHEMICAL VAPOR DEPOSITION ON (0001) SAPPHIRE SUBSTRATES Dimitri Alexson1, Leah Bergman1, Robert J. Nemanich1, Mitra Dutta2, Michael A. Stroscio2, C.A. Parker3, S.M. Bedair3, N.A. El-Masry4, Fran Adar5. 1 North Carolina State University, Physics Department, Raleigh, NC 27695-8202, U.S.A 2 U.S. Army Research Office, P.O. Box 12211, Research Triangle Park, NC 27709 3 North Carolina State University, Electrical and Computer Engineering, Raleigh, NC 27695 4 North Carolina State University, Materials Science and Engineering, Raleigh, NC 27695 5 Jobin Yvon HORIBA Group, 3880 Park Avenue, Edison, NJ, 08820-3097, U.S.A. ABSTRACT We report on UV Raman spectroscopy of InxGa1-xN thin films grown on (0001) sapphire substrates using a specially designed metal-organic chemical vapor deposition (MOCVD) reactor. Eight films were examined in the compositional range 0

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