کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1537649 1512640 2011 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Self-imaging by a volume grating
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد مواد الکترونیکی، نوری و مغناطیسی
پیش نمایش صفحه اول مقاله
Self-imaging by a volume grating
چکیده انگلیسی

The self-image phenomenon by a volume grating is proposed and theoretically analyzed. A theoretical model based on a path integral formulation to describe wave propagation through the grating inhomogeneous medium is applied. A modified version of the scalar diffraction theory Fresnel propagator is obtained which allows calculating the diffracted field amplitude by the grating. The proposed model is applied to amplitude and/or phase volume gratings. Remarkable features appear, in particular at the fractional Talbot distance 0.125zT. In this case, if an in-phase real and imaginary grating modulation is considered a self-image intensity profile is observed for determined values of the absorptive and refractive parameters. On the other hand, a spatial comb intensity profile for a near half period shift between the real and imaginary grating modulations is found.

Research highlights
► A proper model allows calculating the self-images generated by a volume grating.
► In-phase grating provides self-images at the fractional Talbot distance 0.125zT.
► Out-of-phase grating provides a spatial comb at fractional Talbot distance 0.125zT.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Optics Communications - Volume 284, Issues 10–11, 15 May 2011, Pages 2494–2499
نویسندگان
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