کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1670481 | 1008900 | 2010 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Optical limiting in hydrogenated amorphous silicon-selenium thin films
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
فناوری نانو (نانو تکنولوژی)
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Optical limiting in hydrogenated amorphous silicon-selenium thin films Optical limiting in hydrogenated amorphous silicon-selenium thin films](/preview/png/1670481.png)
چکیده انگلیسی
Hydrogenated amorphous silicon-selenium alloy thin films grown by capacitively coupled radio-frequency glow-discharge are investigated. Nonlinear absorptive effects are evaluated with the help of open aperture z-scan technique in the 525 to 580 nm spectral range. The nonlinear absorption coefficient is found to be very large and reaching the value of 5.14 Ã 10â 3 cm/W at 525 nm. The origin of the optical nonlinearities is studied and found to be due mainly to two photon absorption in the case of pulsed excitation, whereas thermal effects are thought to be dominant when the sample is excited with a continuous wave laser. Optical limiting potentialities of the thin film are experimentally observed and their thresholds are found to be very low.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Thin Solid Films - Volume 518, Issue 14, 3 May 2010, Pages 3933-3937
Journal: Thin Solid Films - Volume 518, Issue 14, 3 May 2010, Pages 3933-3937
نویسندگان
Hacene Manaa, Abdullah Al-Mulla, Noor Al-Jamal, Shawqi Al-Dallal, Saleh Al-Alawi,