کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1540419 | 996660 | 2009 | 4 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Photorefractive effect in Fe-doped GaN
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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: Photorefractive effect in Fe-doped GaN Photorefractive effect in Fe-doped GaN](/preview/png/1540419.png)
چکیده انگلیسی
The photorefractive effect was observed in Fe-doped semi-insulating GaN. We measured the two-beam coupling constant and the grating formation time as a function of pump intensity at a wavelength of 458 nm in reflection geometry. The photorefractive gain coefficient was 0.39 cm−1, and the grating formation time was 7 ms at a pump intensity of 1.0 W/cm2. Besides the refractive index grating, the contribution of an absorption grating was also observed in a two-wave mixing experiment. The coupling constant of the absorption grating was negative and increased with the pump intensity. The origin of the absorption grating was attributed to light-intensity-dependent photochromism.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Optics Communications - Volume 282, Issue 9, 1 May 2009, Pages 1918–1921
Journal: Optics Communications - Volume 282, Issue 9, 1 May 2009, Pages 1918–1921
نویسندگان
H. Kiyama, R. Fujimura, T. Shimura, K. Kuroda,