کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1595722 | 1002788 | 2007 | 4 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Optical nonlinearities in direct and indirect band gap crystals on the Z-scan technique with nanosecond laser
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
دانش مواد (عمومی)
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Optical nonlinearities in direct and indirect band gap crystals on the Z-scan technique with nanosecond laser Optical nonlinearities in direct and indirect band gap crystals on the Z-scan technique with nanosecond laser](/preview/png/1595722.png)
چکیده انگلیسی
The free carrier optical nonlinearities in direct and indirect band gap crystals have been investigated by the use of a single beam Z-scan technique. The values of two-photon absorption coefficient (β), nonlinear index n2(w), the total free carrier absorption cross-section (Ïab) and the change in the refractive index per unit carrier density (Ïnr) are determined in both direct and indirect band gap crystals. Smaller values of (β) and (Ïab) in the case of indirect band gap crystals have been attributed to phonon assisted transitions, while the smaller value of n2(w) and (Ïnr) is due to the rise in saturation taking place in the absorption.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Solid State Communications - Volume 141, Issue 8, February 2007, Pages 445-448
Journal: Solid State Communications - Volume 141, Issue 8, February 2007, Pages 445-448
نویسندگان
Arun Gaur, D.K. Sharma, D.S. Ahlawat, Nageshwar Singh,