کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1537649 | 1512640 | 2011 | 6 صفحه PDF | دانلود رایگان |

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.
Journal: Optics Communications - Volume 284, Issues 10–11, 15 May 2011, Pages 2494–2499