کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5368554 1388400 2006 4 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
“Anomalous” pseudodielectric function of GaN: Experiment, modelling and application to the study of surface properties
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
“Anomalous” pseudodielectric function of GaN: Experiment, modelling and application to the study of surface properties
چکیده انگلیسی

Studying GaN films exposed to Ar plasma by spectroscopic ellipsometry and reflectance, we found an “anomalous” pseudodielectric function (PDF) for which the imaginary part is significantly higher as compared to GaN, while the real part of the PDF remains close to the value for GaN. In addition, a higher reflectance at low angles of incidence was observed. The data are explained in terms of a thin highly absorbing surface layer arising due to non-stoichiometry in the near-surface region. Comparison to samples grown by molecular beam epitaxy shows that similar mechanisms are responsible for optical properties of the surfaces of films obtained under Ga-rich conditions.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Surface Science - Volume 253, Issue 1, 31 October 2006, Pages 224-227
نویسندگان
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