Design of On-Chip N-Fold Orbital Angular Momentum Multicasting Using V-Shaped Antenna Array

Abstract

We design a V-shaped antenna array to realize on-chip multicasting from a single Gaussian beam to four orbital angular momentum (OAM) beams. A pattern search assisted iterative (PSI) algorithm is used to design an optimized continuous phase pattern which is further discretized to generate collinearly superimposed multiple OAM beams. Replacing the designed discrete phase pattern with corresponding V-shaped antennas, on-chip N-fold OAM multicasting is achieved. The designed on-chip 4-fold OAM multicasting exploiting V-shaped antenna array shows favorable operation performance with low crosstalk less than -15 dB.

Excitation of Mode Groups in Multimode Fibers With the Aid of Diffractive Optics

“…where pixels , has been used previously [12] as a measure of the fidelity of a given transmitted or reconstructed mode to its theoretical expectation. In our case it includes power fractions converted to all potentially additional channels upon transmission by the fiber.…”

Plasmonic and Dielectric Metasurfaces: Design, Fabrication and Applications

“…In this review article, we go over our recent progress in plasmonic and dielectric metasurface-assisted nanophotonic devices and their design, fabrication and applications, including the metasurface-based broadband and selective generation of orbital angular momentum (OAM) carrying vector beams [118,119], N-fold OAM multicasting using a V-shaped antenna array [120], metasurfaces on a conventional optical fiber facet for linearly-polarized mode (LP 11 ) generation [121], graphene split-ring metasurface-assisted terahertz coherent perfect absorption [122], OAM beam generation using a nanophotonic dielectric metasurface array [123] and Bessel beam generation and OAM multicasting using dielectric metasurface array [124].…”

“…At the OAM demultiplexing side, those N OAM beams (. .., li-1, li, li+1, ...) are distributed to N end users [120] Design: We design a V-shaped antenna array to realize on-chip multicasting from a single Gaussian beam to four OAM beams. Figure 9 illustrates the concept and principle of N-fold multicasting of OAM beams using V-shaped antennas.…”

“…Figure 8 shows the schematic diagram of the fabrication process of the proposed metasurfaces: (1) using standard electron-beam lithography to generate patterns on the glass substrate; (2) 5 nm Cr and 200 nm Au layers are then respectively deposited on the substrate using electron-beam evaporation; (3) removing the photoresist and undesired metal layers. [120] Design: We design a V-shaped antenna array to realize on-chip multicasting from a single Gaussian beam to four OAM beams. Figure 9 illustrates the concept and principle of N-fold multicasting of OAM beams using V-shaped antennas.…”

Manipulating orbital angular momentum of light with tailored in-plane polarization states

“…A great success has been achieved in the creation and manipulation of optical OAM and a varierty of practical applications were developed such as imaging and metrology8910, atom optics111213, nonlinear optics141516, optical spanner1718, quantum optics and information19202122, optical communications2324252627282930, and others. The conventional ways to manipulate the optical OAM rely on the phase components/devices, e.g., spiral phase plates31323334, q -plates35, computer-generated holograms3637, sub-wavelength gratings38 and plasmonic metasurfaces394041. These devices can effectively control the outputting phase to generate beams with desired OAM modes.…”