CIOP 05384
CENTRO DE INVESTIGACIONES OPTICAS
Unidad Ejecutora - UE
artículos
Título:
Self-imaging by a volume grating
Autor/es:
GUSTAVO FORTE, ALBERTO LENCINA, MYRIAN TEBALDI, NÉSTOR BOLOGNINI
Revista:
OPTICS COMMUNICATIONS
Editorial:
ELSEVIER SCIENCE BV
Referencias:
Año: 2011 vol. 284 p. 2494 - 2499
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 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.
