CIOP 05384
CENTRO DE INVESTIGACIONES OPTICAS
Unidad Ejecutora - UE
artículos
Título:
Self-imaging by a volume grating
Autor/es:
G. FORTE; A. LENCINA; M. TEBALDI; N. BOLOGNINI
Revista:
OPTICS COMMUNICATIONS
Editorial:
ELSEVIER SCIENCE BV
Referencias:
Lugar: Amsterdam; Año: 2010
ISSN:
0030-4018
Resumen:
The self-image phenomenon by a volume grating is proposed and theoretically analyzed. A theoretical model based on a path integral formulation is developed to describe wave propagation through the grating inhomogeneous medium. A modified version of the scalar diffraction theory Fresnel propagator is obtained which allow 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 0.125 zT. 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.
