کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9821626 | 1518988 | 2005 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Raman and photoluminescence spectroscopy from n- and p-type 6H-SIC alpha-particle irradiated
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
سطوح، پوششها و فیلمها
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چکیده انگلیسی
We report optical properties of n-nitrogen and p-boron-type 6H-SiC alpha-particle irradiated at doses 1012-1014 cmâ2. The back scattering Raman Spectroscopy (RS) from the reference samples reveals all the four first-order Raman active modes (1-RAMs) as well as all the 12th folded vibrational modes (FVMs) previously observed and tabulated. The irradiation at low doses induces several Raman optically active bands in the n- and p-type 6H-SiC. In order to identify the new modes we have derived some group-theoretical Raman selection rules (RSRs). Using the RSRs we have distinguished treatment-induced modes from the first-order RAM belonging to 6H-SiC. Moreover, by means of the RSRs we have made an attempt to identify the origins of some of the second-order phonons traditionally labelled as: a, b, â¦.., h. Photoluminescence spectroscopy (PL) also monitors some new bands treatment induced. Some of them are temperature and laser power dependent.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Vacuum - Volume 78, Issues 2â4, 30 May 2005, Pages 503-508
Journal: Vacuum - Volume 78, Issues 2â4, 30 May 2005, Pages 503-508
نویسندگان
H.W. Kunert, T. Maurice, J. Barnas, J. Malherbe, D.J. Brink, L. Prinsloo,