Optical reconstruction of non-diffracting beams via photorefractive holography

Abstract

This work presents, for the first time the optical generation of non-diffracting beams via photorefractive holography. Optical generation of non-diffracting beams using conventional optics components is difficult and, in some instances, unfeasible, as it is wave fields given by superposition of non-diffracting beams. It is known that computer generated holograms and spatial light modulators (SLMs) successfully generate such beams. With photorefractive holography technique, the hologram of a non-diffracting beam is constructed (recorded) and reconstructed (reading) optically in a nonlinear photorefractive medium. The experimental realization of a non-diffracting beam was made in a photorefractive holography setup using a photorefractive Bi12SiO20 (BSO) crystal as the holographic recording medium, where the non-diffracting beams, the Bessel beam arrays and superposition of co-propagating Bessel beams (Frozen Waves) were obtained experimentally. The experimental results are in agreement with the theoretically predicted results, presenting excellent prospects for implementation of this technique for dynamical systems at applications in optics and photonics.

Possibilities to generation of optical non-diffracting beams by holographic metasurfaces using surface impedance

“…And, we also reproduce the CGH of a FW beam, with a resolution of 128x128 pixels, N = 6, spot size of 47.9 mm and generated to a wavelength of λ = 536nm, corresponding to our operating frequency, the corresponding holographic metasurface is shown in the Fig. 20.Others HMS for LG beams and Mathieus beams (Figures 21 and 22, respectively) [43].…”

“…On the other hand, non-diffracting waves are beams and pulses that keep their intensity spatial shape during propagation [29,30,31,32,33,34,35,36,37,38,39,40,41,42,43]. Pure non-diffracting waves include Bessel beams, Mathieus beams, Parabolic beams, and others; as well as the superposition of these waves can produce very special diffraction-resistant beams, such as the Frozen Waves.…”

“…4. Non-diffracting beams -Non-diffracting waves are beams and pulses that keep their intensity spatial shape during propagation [29,30,31,32,33,34,35,36,37,38,39,40,41,43].…”

Tunable Axicons Generated by Spatial Light Modulator with High-Level Phase Computer-Generated Holograms

“…The shortcoming of this method is that it needs a real glass axicon as a model [10]. Some scholars used the computer-generated holograms (CGHs) to achieve an approximately diffraction-free, arbitrary-order Bessel beam series [11][12][13][14][15]. The holograms were fabricated as phase-only structures by using the more-sophisticated techniques of photolithography.…”

Holographic metasurfaces applied to generation of non-diffracting beams

“…2. Non-diffracting waves -Non-diffracting waves are beams and pulses that keep their intensity spatial shape during propagation [29,30,31,32,33,34,35,36,37,38,39,40]. Pure non-diffracting waves include Bessel beams, Mathieus beams and Parabolic beams; as well as the superposition of these waves can produce very special diffraction-resistant beams, such as the Frozen Waves.…”