کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1547686 | 1512907 | 2007 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Optical inter- and intra-band transitions in silicon nanocrystals: The role of surface vibrations
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
مواد الکترونیکی، نوری و مغناطیسی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Optical inter- and intra-band transitions in silicon nanocrystals: The role of surface vibrations Optical inter- and intra-band transitions in silicon nanocrystals: The role of surface vibrations](/preview/png/1547686.png)
چکیده انگلیسی
Silicon nanocrystals (ncs) belong to an interesting class of semiconductor nanostructures that manifest size dependent electronic properties. This well known effect of quantum confinement can explain many properties of silicon ncs. However, with decreasing size and dimension of the ncs, the role of surface phenomena becomes substantial. For example, we have shown recently that the strong luminescence from these ncs should be assigned to the exclusion of nonradiative channels rather than to the enhancement of radiative inter-band transitions. In addition, using infrared intra-band transitions spectroscopy, we were able to resolve the quantized electronic sublevels of small silicon ncs. We have found that under appropriate conditions, these electronic sublevels are resonantly coupled to surface vibrations. We suggest that this coupling mechanism is responsible for the exclusion of nonradiative channels in silicon ncs.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Physica E: Low-dimensional Systems and Nanostructures - Volume 38, Issues 1â2, April 2007, Pages 122-127
Journal: Physica E: Low-dimensional Systems and Nanostructures - Volume 38, Issues 1â2, April 2007, Pages 122-127
نویسندگان
A. Sa'ar, M. Dovrat, J. Jedrzejewski, I. Balberg,