DOI
https://doi.org/10.25772/BJC4-R640
Defense Date
2006
Document Type
Thesis
Degree Name
Master of Science
Department
Physics
First Advisor
Dr. Martin Muñoz
Abstract
Contactless electroreflectance (CER), a modulation spectroscopy (MS) technique, has been used to study the A and C exciton transitions in A1xGa1-xN layers for a composition range of 0 ≤ x ≤ 0.48 at room temperature. Taking the entire composition range (0 ≤ x ≤ 1) into account by incorporating a previously reported band gap energy for AlN, the dependence of the A-exciton transition on composition showed a downward bowing from linearity. A bowing parameter of b = 1.7 eV was found. Analysis of the lower composition range 0 ≤ x ≤ 0.48 resulted in a linear fit, as did the trend for the detectable C exciton transitions. The slope of the linear trendlines for the A and C exciton were practically the same.
Rights
© The Author
Is Part Of
VCU University Archives
Is Part Of
VCU Theses and Dissertations
Date of Submission
June 2008