Reciprocal Circular Polarization Handedness Conversion Using Chiral Metamaterials

Fernández, Óscar Fernández; Gómez, Ana Almaraz; Basterrechea, J.; Vegas, Α.

doi:10.1109/lawp.2017.2715830

Cited by 40 publications

(15 citation statements)

References 19 publications

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“…(LP) [2]- [14], [30] or circular-polarized (CP) [13]- [19] incidence, transmissive cross polarization conversion at LP [5], [20]- [23] or CP [24]- [26] incidence, and reflective [27]- [32] and transmissive [33]- [45] linear-to-circular (LTC) polarization conversion at LP incidence. Compared with the polarization converters designed in conventional method, these polarization converters always have several better performances, such as thinner, wider band and higher efficiency.…”

Section: Introductionmentioning

confidence: 99%

An Ultra-Wideband Reflective Linear-to-Circular Polarization Converter Based on Anisotropic Metasurface

Bao-Qin

Guo

et al. 2020

IEEE Access

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In this work, an ultra-wideband and high-efficiency reflective linear-to-circular polarization converter based on an anisotropic metasurface is proposed, which is an orthotropic structure with a pair of mutually perpendicular symmetric axes u and v along ±45 • directions with respect to the vertical y axis. The simulated and experimental results show that the polarization converter can realize ultrawideband linear-to-circular polarization conversion at both x-and y-polarized incidences, its 3dB-axialratio-band is between 5.8 and 20.4 GHz, which is corresponding to a relative bandwidth of 112%; moreover, the polarization conversion efficiency (PCE) can be kept larger than 99.6% in the frequency range of 6.1-19.8GHz. In addition, to get an insight into the root cause of the LTC polarization conversion, a detailed theoretical analysis is presented, in which the conclusion is reached that in the case of neglecting thelittle dielectric loss, the axial ratio (AR) of the reflected wave can be completely determined by the phase difference between the two reflection coefficients at u-and v-polarized incidences, and any anisotropic metasurface can be used as an effective LTC polarization converter when the phase difference is close to ±90 • .

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Section: Introductionmentioning

confidence: 99%

An Ultra-Wideband Reflective Linear-to-Circular Polarization Converter Based on Anisotropic Metasurface

Bao-Qin

Guo

et al. 2020

IEEE Access

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“…[ 7–9 ] By optimizing the structure, geometry, and orientation of meta‐element, multiple polarization states of EM waves can be achieved. [ 10–19 ] Furthermore, the concept and design of digital coding and programmable metasurfaces that are incorporated with active devices (PIN diodes and varactor diodes) and field programmable gate array (FPGA) make it possible for the dynamic polarization controls. [ 20–27 ]…”

Section: Introductionmentioning

confidence: 99%

Linear and Nonlinear Polarization Syntheses and Their Programmable Controls based on Anisotropic Time‐Domain Digital Coding Metasurface

Dai

Chen

et al. 2020

Small Structures

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Spatial polarization converter can shift the polarization state of incident wave to another state in a specific frequency band. The traditional polarization conversion devices mainly include natural materials and artificial electromagnetic (EM) structures, which are generally sensitive to the incident polarization states and cannot realize polarization manipulations of nonlinear harmonics. These drawbacks limit their developments in wireless communications and radar detection applications. Herein, a general polarization regulation scheme based on anisotropic time‐domain digital coding metasurface is proposed that can achieve both linear and nonlinear polarization syntheses and realize their programmable controls in real time. In this scheme, a nonlinear modulation theory into the polarization conversion methods is integrated, and thus, the scope of the polarization regulation is expanded. An anisotropic time‐domain digital coding metasurface is designed and fabricated to validate the feasibility of the proposed scheme. Theoretical predictions have good agreements with the experiments. The results of this study are expected to promote the developments of space‐time‐polarization regulations and provide efficient approaches for precise EM detections.

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“…Large thickness and narrow bandwidth nevertheless exclude them being embedded onto communication systems. Another traditional ways to control polarization states are employing chiral and anisotropic metamaterials . Recent years, metasurfaces were proposed to produce polarization convertors .…”

Section: Introductionmentioning

confidence: 99%

High efficient multi‐bands circular polarization convertor based on spoof surface plasmon polariton

Karamirad

Ghobadi

Nourinia

et al. 2019

Micro & Optical Tech Letters

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In this paper, we propose to achieve a high efficient polarization convertor based on spoof surface plasmon polariton (SSPP). The proposed polarization convertor is realized by a dielectric blade with a metallic pattern on one side. Spatial dispersion modulation is considered by designing the pattern in y-direction while keeping free space in x-direction. Meanwhile, the y-polarized incident wave is well coupled as SSPP mode. Therefore, the circular polarization (CP) conversion is provided regarding to the direction of the incident waves. A frequency bandwidth of 52.7% is obtained for right to left CP while left to right polarization conversion is adopted in a 23% bandwidth. The fabricated prototype of the proposed structure is provided to verify the simulated results. K E Y W O R D S circular polarization conversion, dispersion diagram, spoof surface plasmon polariton

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Reciprocal Circular Polarization Handedness Conversion Using Chiral Metamaterials

Cited by 40 publications

References 19 publications

An Ultra-Wideband Reflective Linear-to-Circular Polarization Converter Based on Anisotropic Metasurface

An Ultra-Wideband Reflective Linear-to-Circular Polarization Converter Based on Anisotropic Metasurface

Linear and Nonlinear Polarization Syntheses and Their Programmable Controls based on Anisotropic Time‐Domain Digital Coding Metasurface

High efficient multi‐bands circular polarization convertor based on spoof surface plasmon polariton

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