Modeling the longitudinal intensity pattern of diffraction resistant beams in stratified media

Abstract

In this paper, we study the propagation of the frozen wave (FW)-type beams through non-absorbing stratified media and develop a theoretical method capable of providing the desired spatially shaped diffraction-resistant beam in the last material medium. In this context, we also develop a matrix method to deal with stratified media with a large number of layers. Additionally, we undertake some discussion about minimizing reflection of the incident FW beam on the first material interface by using thin films. Our results show that it is indeed possible to obtain the control, on demand, of the longitudinal intensity pattern of a diffraction-resistant beam, even after it undergoes multiple reflections and transmissions at the layer interfaces. Remote sensing, medical and military applications, noninvasive optical measurements, etc., are some fields that can benefit from the method here proposed.

Microstructured optical beams with azimuthal polarization in stratified absorbent media

“…In spite of being originally developed for homogeneous media, some advances have been accomplished for inhomogeneous cases, 16 allowing to design a paraxial FW‐type beam that, when propagating through a multilayered nonabsorbing media, is able to compensate the effects of inhomogeneity, providing the desired structured optical beam in the last medium.…”