1-bit digital orbital angular momentum vortex beam generator based on a coding reflective metasurface

Han, Jiaqi; Li, Long; Yi, Hao; Shi, Yan

doi:10.1364/ome.8.003470

Cited by 55 publications

(29 citation statements)

References 28 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…A tunable metasurface generating vortex beams with any OAM modes is proposed in Reference [62]. A positive intrinsic negative (PIN) diode is utilized as a switch between the two rectangular patches constituting the unit cell of the metasurface, as presented in Figure 10b.…”

Section: Reflective Metasurfacesmentioning

confidence: 99%

A Review of Orbital Angular Momentum Vortex Beams Generation: From Traditional Methods to Metasurfaces

et al. 2020

View full text Add to dashboard Cite

In this paper, we review the generation of vortex beams carrying orbital angular momentum in the microwave domain. We firstly present the theory of Laguerre–Gaussian beams where it is demonstrated that they carry such type of momentum. We further provide an overview of the classical methods used to generate orbital angular momentum vortex beams, which rely on two main methods; plane wave to vortex wave conversion and direct generation using radiating antennas. Then, we present recent progress in the physics of metasurfaces devoted to the generation of vortex beams with a discussion about reflective and transmissive metasurfaces for plane wave to vortex wave conversion as well as methods to reduce the intrinsic divergence characteristics of vortex beams. Finally, we conclude on this rapidly developing research field.

show abstract

Section: Reflective Metasurfacesmentioning

confidence: 99%

A Review of Orbital Angular Momentum Vortex Beams Generation: From Traditional Methods to Metasurfaces

et al. 2020

View full text Add to dashboard Cite

show abstract

“…Nevertheless, our simulated and measured results validate the effectiveness and high efficiency of generating multimode OAM beams even in a 1-bit programmable metasurface, similar to those found in ref. [30].…”

Section: Experimental Verificationmentioning

confidence: 99%

“…[28,29] Digital reflective metasurfaces were deservedly of great significance for the progress in dynamic modulation of the multimode OAM beams. [30,31] A 1-bit digital OAM generator was constructed through coding reflective metasurface integrating PIN diodes for the alteration of resonant properties in unit, and the feasibility of the binary-state metasurface for OAM modulation was demonstrated through comparing with that www.advopticalmat.de of analog continuous compensation phase. [30] Later, the 2-bit digital reflective metasurface was constructed from reconfigurable units integrated by a voltage-controlled varactor diode to generate multimode OAM beams.…”

Section: Introductionmentioning

confidence: 99%

“…[30,31] A 1-bit digital OAM generator was constructed through coding reflective metasurface integrating PIN diodes for the alteration of resonant properties in unit, and the feasibility of the binary-state metasurface for OAM modulation was demonstrated through comparing with that www.advopticalmat.de of analog continuous compensation phase. [30] Later, the 2-bit digital reflective metasurface was constructed from reconfigurable units integrated by a voltage-controlled varactor diode to generate multimode OAM beams. [31] Since there are serious feed blockages and poor phase-difference stability exhibited by the digital reflective metasurfaces, the radiation efficiency and the purity of OAM modes have both been seriously affected by the deficiencies.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

High‐Efficiency Transmissive Programmable Metasurface for Multimode OAM Generation

Bai¹,

Kong²,

Sun³

et al. 2020

Advanced Optical Materials

193

View full text Add to dashboard Cite

Metasurfaces have been extensively studied for generating electromagnetic waves carrying orbital angular momentum (OAM). In particular, programmable metasurfaces enable real‐time switching between multiple OAM modes in a digital manner. However, the current programmable metasurfaces are mostly based on reflective mode, which suffer from low efficiency as well as serious feed blockage. In this paper, a transmissive programmable metasurface is presented for the highly efficient generation of multimode convergent OAM beams. The proposed transmissive metasurface is composed of electronically reconfigurable units with 1‐bit phase resolution (0/π), which are obtained by integrating two PIN diodes in the radiating layer for current direction modulation. Through the antisymmetry configuration of the two PIN diodes, nearly uniform transmission magnitudes but inversed phase states in a wide band can be obtained. The simulation results show that the proposed reconfigurable unit can achieve good 1‐bit phase tuning, with minimum insertion loss of 0.2 dB and 2 dB transmission bandwidth of more than 10%. Through the dynamic modulation of the quantized code distributions on the metasurface, programmable multimode OAM beams can thus be constructed. Both simulated and measured results verify the effectiveness of the proposed design.

show abstract

“…Ulteriorly, the metasurface unit can obtain a clear alteration in resonant property through integrating lumped components, and the programmable reflective metasurfaces are thus actually constructed for the dynamic modulation of the electromagnetic waves [27]. The digital reflective metasurfaces were constructed by designing reconfigurable cells combined with the PIN diodes for binary phase states [28,29]. Later, two-bit reflective programable metasurfaces were designed by integrating two PIN diodes or a voltage-controlled varactor diode to modulate the resonant characteristics of the reconfigurable units [30,31].…”

Section: Introductionmentioning

confidence: 99%

Construction of a Cost-Effective Phased Array Through High-Efficiency Transmissive Programable Metasurface

Chen

Kai

et al. 2020

Front. Phys.

View full text Add to dashboard Cite

Programmable metasurfaces have shown great potential in the areas of low-complexity phase array systems in comparison with the conventional phased array antennas. In this document, a 1-bit transmissive programable metasurface with high efficiency is proposed for the cost-effective beam-steering phased array. The designed transmissive metasurface is made up of reconfigurable cells with perfect 1-bit phase tuning and less transmission losses. Through dynamically programming the 1-bit code distributions of the metasurface, real-time scanning pencil beams in desired directions can be created.

show abstract

1-bit digital orbital angular momentum vortex beam generator based on a coding reflective metasurface

Cited by 55 publications

References 28 publications

A Review of Orbital Angular Momentum Vortex Beams Generation: From Traditional Methods to Metasurfaces

A Review of Orbital Angular Momentum Vortex Beams Generation: From Traditional Methods to Metasurfaces

High‐Efficiency Transmissive Programmable Metasurface for Multimode OAM Generation

Construction of a Cost-Effective Phased Array Through High-Efficiency Transmissive Programable Metasurface

Contact Info

Product

Resources

About