کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1540416 996660 2009 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Stretched exponential kinetics for photoinduced birefringence in azo dye doped PVA films
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد مواد الکترونیکی، نوری و مغناطیسی
پیش نمایش صفحه اول مقاله
Stretched exponential kinetics for photoinduced birefringence in azo dye doped PVA films
چکیده انگلیسی
We fabricated azo dye (methylorange) doped poly vinyl alcohol (MO/PVA) thin films and measured the photoinduced birefringence (PIB) kinetics for several pump beam intensities and for various MO concentrations by using the pump-probe technique. A novel approach to explain the transient behaviors of the photoinduced anisotropy is presented by employing an empirical stretched exponential time response in the course of the trans-cis-trans photoisomerization of azo molecules and is compared with the experimental data, showing excellent agreement. The stretched exponent is estimated to be β = 0.34 ± 0.04, revealing amorphous nature of the MO/PVA system.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Optics Communications - Volume 282, Issue 9, 1 May 2009, Pages 1902-1908
نویسندگان
, , , , ,