Vortex beam manipulation through a tunable plasma-ferrite metamaterial

Abstract

This paper is devoted to the study of vortex beam transmission from an adjustable magnetized plasma-ferrite structure with negative refraction index. We use the angular spectral expansion technique together with the $$4\times 4$$ 4 × 4 matrix method to find out the transmitted intensity and phase profiles of incoming Laguerre-Gaussian beam. Based on numerical analysis we demonstrate that high transparency and large amount of Faraday rotation in the proximity of resonance frequency region, reverse rotation of spiral wave front, and side-band modes generation during propagation are the remarkable features of our proposed structure. These controllable properties of plasma-ferrite metamaterials via external static magnetic field and other structure parameters provide novel facilities for manipulating intensity and phase profiles of vortex radiation in transmission through the material. It is expected that the results of this work will be beneficial to develop active magneto-optical devices, orbital angular momentum based applications, and wavefront engineering.

Geometric-phase-based shearing interferometry for broadband vortex state decoding

“…Considering a single-ringed Laguerre–Gaussian beam, the Jones vector of the incident light is where with ω 0 being the waist width and m being the OAM order 26 . The primary and conjugate diffraction beams in the holographic light field are expressed as …”

Propagation dynamics of vector vortex beams in a strongly nonlocal nonlinear medium with parity-time-symmetric potentials

“…Over several decades, the generation and manipulation of structured optical filed have drawn a lot of attentions and become a hot research topic. A key feature that enables these emerging findings is the combination with the fantastic properties of the materials with special structures [19][20][21], especially the manipulation the vortex beam with structured material [20,21]. Recently, the propagation dynamics of a vector optical field in a SNNM has revealed novel evolution characteristics of different polarization components [22].…”

X-type vortex and its effect on beam shaping

“…The beam shaping is still an active research field that supplies various methods in inverse problems for getting desired beam patterns [21,22,27] and also gives rise to new research directions in study of structured light [28,29]. Recently, the studies on beam shaping by using new materials, such as plasma-related material [30,31], emerge and exhibit their potential in manipulation of beam structures [32,33]. There are many ways used in beam shaping, basically, including tailoring single parameter, like controlling the spatial distribution of the phase [18,34], the polarization [20,25], the coherence [35,36] of the input beams, and manipulating multi-parameters, for instance the phase-coherence method [37,38], the phase-polarization method [27], the amplitude-phase-polarization joint method [39].…”