Chinese Optics Letters, Volume. 22, Issue 1, 011601(2024)
Toroidal dipole response in rectangular waveguide: used to generate vector beams and vector vortex beams
Figures & Tables(12)
Fig. 1. Resonant cavity design. (a) 3D view, (b) top view of the feeding layer, and (c) top view of the slot layer.
Fig. 2. (a) The S-parameter response and far-field pattern. (b) The calculation of the multipole scattering energy of each multipole moment. (c) The Z-component magnetic field. (d) The Z-component electric field. (e) The slot surface magnetic field.
Fig. 3. (a) The magnetic field distribution of the outgoing electromagnetic wave. (b) The electric field distribution of the outgoing electromagnetic wave. (c) The magnetic field amplitude of the outgoing electromagnetic wave. (d)–(f) The Phase distribution of Hx, Hy, and Hz.
Fig. 4. (a) The S-parameter response for the different combinations of the radiation slots. (b) The effect of offset on the S-parameters. (c) The far-field radiation when different dipole moments dominate.
Fig. 5. (a) S-parameter response without the top radiation slot and metal short-circuit wall. (b) Magnetic field distribution in the cavity layer. (c) Surface current distribution of the top metal.
Fig. 6. (a) The S-parameter response and far-field pattern of the designed structure. (b) The surface current distribution of the top metal plane. (c) The electric field distribution in the radiation slot. (d) The Z-component magnetic field at 56.1 GHz.
Fig. 7. Far-field phase distribution of the designed resonator in the range of 53 GHz to 58 GHz.
Fig. 8. Calculation results of the multipole scattering energy in a radiation slot.
Fig. 9. (a) The electric field distribution. (b) The magnetic field distribution. (c) The intensity distribution of the vector vortex beam passing through different polarizers. (Only the polarization state in the direction of the arrow is allowed to pass through.)
Fig. 10. (a) The influence of l2 on the S-parameter. (b)–(e) The phase distribution of the emitted electric field at the peak under different offsets.
Fig. 11. OAM pattern variation of the x-polarized and y-polarized electric fields with propagation distance (Z is the distance between the observation plane and the antenna base).
Table 1. Comparison with Other Methods for Generating Vortex Beams
View tableView in ArticleTable 1. Comparison with Other Methods for Generating Vortex Beams
Reference Method Size (L × W × H) Polarization Number of elements [ 34 ]Ring patch antenna 1.67λ × 2λ × not mentioned Not mentioned 1 × 1 [ 35 ]Metasurface antenna array 1.98λ × 1.98λ × 0.07λ CP 2 × 2 [ 36 ]Metasurface array 2.38λ × 2.38λ × 0.069λ LP 2 × 2 [ 37 ]Spoof-plasmon ring resonators > 2.77λ × 2.77λ × not mentioned Vector 1 × 1 This work Toroidal dipole 1.75λ × 1.75λ × 1.9λ Vector 1 × 1
Tools
Get Citation
Copy Citation Text
Hao Luo, Cong Chen, Peng Gao, Yue Feng, Ziyan Ren, Yujia Qiao, Hai Liu. Toroidal dipole response in rectangular waveguide: used to generate vector beams and vector vortex beams[J]. Chinese Optics Letters, 2024, 22(1): 011601
Paper Information
Category: Optical Materials
Received: Jun. 12, 2023
Accepted: Sep. 5, 2023
Posted: Sep. 6, 2023
Published Online: Jan. 22, 2024
The Author Email: Hai Liu (lhai_hust@hotmail.com)
© Copyright 2018-2021 | Chinese Laser Press.
All Rights Reserved 沪ICP备15018463号-20