Ultra-thin optical vortex phase plate based on the metasurface and the angular momentum transformation

Abstract

The ultra-thin optical vortex phase plate (VPP) has been designed and investigated based on the metasurface of the metal rectangular split-ring resonators (MRSRRs) array. The circularly polarized incident light can convert into corresponding cross-polarization transmission light, and the phase and the amplitude of cross-polarization transmission light can be simultaneously governed by modulating two arms of the MRSRR. The MRSRR has been arranged in a special order for forming an ultra-thin optical VPP that can covert a plane wave into a vortex beam with a variety of the topological charges, and the transformation between spin angular momentum (SAM) and orbital angular momentum (OAM) has been discussed in detail. The multi-spectral characteristics of the VPP have also been investigated, and the operating bandwidth of the designed VPP is 190 nm (in the range of 710–900 nm), which enable a potential implication for integrated optics and vortex optics.

Orbital Angular Momentum Waves: Generation, Detection, and Emerging Applications

“…In this section, we discuss various state-of-the-art methods for generating OAM in the fields of light, radio, and sound waves. Because of the Cylindrical lenses [1], [11] Spiral phase plates (SPPs) [12] Holographic gratings [13]- [15] Spatial light modulators (SLMs) [16], [17] Metamaterials [20]- [24] Liquid crystal q-plates [25], [26] Spiral phase plates (SPPs) [29]- [31], [35], [36] Spiral reflectors [33], [34] Holographic gratings [32] Uniform circular antenna arrays (UCAAs) [2], [8], [37]- [41] Metamaterials [44]- [49] Dielectric q-plates [50] Spiral phase plates (SPPs) [51], [52] Uniform circular transducer arrays (UCTAs) [4], [55]- [58] Spiral diffraction gratings [59]- [62] Metamaterials [64]- [66] Optical OAM Radio OAM Acoustic OAM large number of methods discussed, Fig. 2 shows a diagram that summarizes a taxonomy of the techniques presented in this section.…”

High-Efficiency and Broadband Near-Infrared Bi-Functional Metasurface Based on Rotary Different-Size Silicon Nanobricks

“…To present a bi-functional metasurface without functional crosstalk, we firstly try to analyze and study the dielectric anisotropic rotary nanobrick, which can introduce elastic phase delays for LCP and RCP incidences. Generally speaking, for a nanobrick, the transmission matrix T [11] can be written as…”

“…In the past few years, there have been rapid and significant developments in both theory and practical research about metasurfaces. Many fascinating phenomena have been discovered, such as anomalous reflection and refraction [1][2][3], metalenses [4][5][6], polarization manipulation [7][8][9], vortex beam generation [10][11][12], and absorbers [13]. Additionally, many ingenious bi-functional metasurfaces have been designed, which holds great promise for integrated optics.…”

Nanoboomerang-based inverse metasurfaces—A promising path towards ultrathin photonic devices for transmission operation

“…3 Due to advances in nanostructuring technology, MSs are used in various fields of photonics, examples of which include sophisticated polarization and beam control, 4 the observation of the photonic spin Hall effect, 5,6 ultra-flat lenses, [7][8][9][10] and the generation of orbital angular momentum states. [11][12][13] Very recent developments in the field include MSs made from non-metallic materials, leading, for instance, to all-dielectric ultra-flat lenses [14][15][16] or for optical cloaks 17 or novel geometries such as catenary MSs. 18 a Author to whom correspondence should be addressed.…”