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

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.