Generating and Steering Quasi-Nondiffractive Beam by Near-Field Planar Risley Prisms

Zhong, Yi; Cheng, Yu Jian

doi:10.1109/tap.2020.2998872

Cited by 21 publications

(16 citation statements)

References 34 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Although the Risley-prism beam-steerable approach has inspired the mechanically beam-steerable antennas 15 , 16 , 33 – 41 with gradient metasurface in the microwave and millimeter-wave range, the solutions are only applicable to radiation beams with the infinity. The blind zone concept does not exist in antenna works 15 , 16 , 33 – 41 . In the optical range, the distances between the light source and the beam trajectories are finite.…”

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

Analytic solution for double optical metasurface beam scanners

Wang

Chen

et al. 2022

Sci Rep

View full text Add to dashboard Cite

Optical metasurfaces are researched more and more intensively for the possible realization of lightweight and compact optical devices with novel functionalities. In this paper, a new beam-steering system based on double metasurface lenses (metalenses) is proposed and developed. The proposed system is lightweight, small volume, low cost, and easy to integrate. The exact close-form forward and numerical inverse solutions are derived respectively using the generalized Snell’s law of refraction. Given the orientations of the double metalenses, the pointing position can be accurately determined. If the desired pointing position is given, the required metalenses’ orientations can be obtained by applied global optimization algorithms to solve nonlinear equations related to the inverse problem. The relationships of the scan region and blind zone with the system parameters are derived. The method to eliminate the blind zone is given. Comparison with double Risley-prism systems is also conducted. This work provides a new approach to control light beams.

show abstract

Section: Discussionmentioning

confidence: 99%

“…1 ) and the target trajectory screen. The forward and inverse solutions 15 , 16 , 33 – 41 in the microwave and millimeter-wave range cannot be directly applied to find the optical beam trajectory.…”

Section: Discussionmentioning

confidence: 99%

Analytic solution for double optical metasurface beam scanners

Wang

Chen

et al. 2022

Sci Rep

View full text Add to dashboard Cite

show abstract

“…Currently, there are mainly two methods to achieve the quasi-Bessel beam: one method is to steer the wavefront of the incident wave by using lens-like devices [17,[30][31][32]; the second method is dependent on the inward cylindrical travelling wave aperture [21,[33][34][35]. Herein, our proposed method is similar to a combination of the two methods; an equivalent axicon-based method is adopted to analytically express the object wave while waveguidefed-based holography is applied to realize the radiation.…”

Section: Design Principlementioning

confidence: 99%

Generation of Circularly Polarized Quasi-Non-Diffractive Vortex Wave via a Microwave Holographic Metasurface Integrated with a Monopole

et al. 2021

View full text Add to dashboard Cite

In this paper, a novel method for generating a circularly polarized (CP) quasi-non-diffractive vortex wave carrying orbital angular momentum (OAM), based on the microwave holographic metasurface integrated with a monopole, is proposed. This method is the combination of the non-diffraction theory and the principle of waveguide-fed-based holography and is equivalent to a superposition of two scalar impedance modulation surfaces. To verify the proposed method, a holographic metasurface generating a left-handed circularly polarized (LHCP) quasi-non-diffractive vortex wave carrying −1 mode OAM at the normal direction, was simulated and analyzed. The metasurface consisted of inhomogeneous slot units on a grounded substrate and a monopole excitation. Moreover, the location distribution of slots was determined by a computed interferogram between the reference wave and the object wave with the non-diffractive feature. Compared with an ordinary vortex wave, the quasi-non-diffractive wave obtained by our proposed method possessed a smaller divergence radius and a stronger electric field strength in the 9 times wavelength range. It paved a new path for manipulating the non-diffractive vortex wave in medium distance without using an external feeding source, which holds great potential for the miniaturization devices applied in medium-distance high-capacity secure communication, high-resolution imaging and intelligent detection.

show abstract

“…To improve the efficiency and tilted angle, Cheng et al proposed the Risley prisms to achieve scanning of nondiffractive beam by mechanically rotating two PSSs. 20 These antennas are designed for threedimensional deflectable nondiffractive beams, but the nondiffractive surface wave is rarely reported, which has good potential in the high-efficiency surface-wave communication with low interference and the nondestructive detection of surface defects. [21][22][23][24][25] To generate the nondiffractive surface-wave, the intersecting metallic gratings were first designed in optics.…”

Section: Introductionmentioning

confidence: 99%

Compact planar meta‐lenses for nondiffracting surface wave deflection

Zhou

Luo

et al. 2023

Micro & Optical Tech Letters

View full text Add to dashboard Cite

A novel planar lens structure is proposed by using metasurfaces to convert cylindrical-like surface wave to inclined nondiffracting wave with a deflection angle. Based on the geometric optics, the refractive index distribution of the surface wave lens is derived. A square metal ring-shaped metasurface cell is used for realizing small refractive index whilst two opposite E-shaped metal patches are used to form the meta-cell with large refractive index. By adjusting the size of meta-cells, the desired refractive index distribution is obtained after optimization. Measured results show that the inclined nondiffractive surface wave can be achieved with the maximum propagation distance of 99.72 mm at the tilted angle of 26.8°, which are consistent with the full-wave simulation and numerical calculation results. The proposed meta-lens achieves compact size, large titled angle, and long nondiffraction propagation distance, therefore could be well utilized in surface wave communication and nondestructive detection of surface defects.

show abstract

Generating and Steering Quasi-Nondiffractive Beam by Near-Field Planar Risley Prisms

Cited by 21 publications

References 34 publications

Analytic solution for double optical metasurface beam scanners

Analytic solution for double optical metasurface beam scanners

Generation of Circularly Polarized Quasi-Non-Diffractive Vortex Wave via a Microwave Holographic Metasurface Integrated with a Monopole

Compact planar meta‐lenses for nondiffracting surface wave deflection

Contact Info

Product

Resources

About