Broadband asymmetric transmission and polarization conversion of a linearly polarized wave based on chiral metamaterial in terahertz region

Liu, Dejun; Xiao, Zhongyin; Ma, Xiaolong; Xu, Kaikai; Tang, Jiang-yao; Zi-hua, Wang

doi:10.1016/j.wavemoti.2016.05.003

Cited by 34 publications

(10 citation statements)

References 30 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…(κ), in the above equation, quantifies the extent of electromagnetic cross coupling in a structure and can be extracted through the following parameter retrieval equations 14,[41][42][43] :…”

Section: Figurementioning

confidence: 99%

Ultra-wideband, Wide Angle, Asymmetric Transmission based Chiral Metasurface for C and X Band Applications

Bokhari

Cheema

2021

Preprint

View full text Add to dashboard Cite

A multi-layered chiral device manifesting asymmetric transmission (AT) facilitating one-way channeling of electromagnetic (EM) waves, based on the inherent polarization is presented. The designed metasurface depicts a high transmission contrast with an efficiency above 80% for an ultra-wide operational range of 6.3-12.3 GHz, constituting a fractional bandwidth of 64%. As an additional feature, the reported metasurface yields robustness against oblique incidences up to 45◦ while maintaining high transmission efficiency. This report also introduces a unique analogy of the AT based communication system with logic-gates by formulating its truth-table and logic circuit. Furthermore, new insights of AT magnitude’s dependence to oblique incidences are presented on the account of surface impedance mismatch due to TE and TM polarization with varying incidence angle. Moreover, avoidance of grating lobes and the associated transmission deterioration through utilization of electrically small periodic metasurface is presented. The results have been numerically and practically validated yielding state-of-the-art features. Operating within C and X band, the reported work is an ideal candidate for practical AT applications.

show abstract

Section: Figurementioning

confidence: 99%

Ultra-wideband, Wide Angle, Asymmetric Transmission based Chiral Metasurface for C and X Band Applications

Bokhari

Cheema

2021

Preprint

View full text Add to dashboard Cite

show abstract

“…With the great capacity to control the polarization of the EM wave, both chiral [13]- [15] and anisotropic structure [16], [17] are adopted in the polarization convertor. Because of the strong coupling between electric and magnetic fields, the chiral structure can rotate the linear-polarization wave into its cross-polarization or circular-polarization.…”

Section: Unit Cell Design and Simulationmentioning

confidence: 99%

“…In the reflection mode, all PIN diodes are turned on and the MRPCM corresponds to a linear polarization converter that can rotate a linearly polarized, either x-or y-polarization, wave to its cross-polarized direction in a wideband from 4.62 to 13.56 GHz, with a mean polarization conversion ratio (PCR) of 90%, whereas when the biasing is in the other combinations, the device is switched to a transmission-type. It can select electronically one working state from x-to-y, y-to-x conversion or just transmission without conversion, while the previous transmission-type PCMs switch from x-toy to y-to-x conversion by mechanically rotating the polarizer [12], [13], which have slow response. Our device enriches the functionality of reconfigurable PCM with a controllable propagation pattern, which has tremendous application potential in adaptive systems and antenna radomes.…”

Section: Introductionmentioning

confidence: 99%

Design of a Multifunctional Reconfigurable Metasurface for Polarization and Propagation Manipulation

Wang

Cao

2019

IEEE Access

View full text Add to dashboard Cite

In this paper, a multifunctional reconfigurable polarization conversion metasurface (MRPCM) is designed for controlling both the propagation and the polarization of electromagnetic wave. The proposed metasurface contains two-layered structures separated by the air layer. The top layer is composed of two back-to-back C-shaped metallic resonators, which is used to convert the polarization. The bottom layer is consisted of two orthogonal metal gratings, which works as the patterned ground. The PIN diodes are embedded on both the upper and lower layer of the patterned ground and controlled through two independent sets of external DC bias network to achieve the multi-function. The gratings serve as both the resonant structure and the PIN diode biasing lines. Therefore, no additional feeding lines are introduced, which can decrease the impact on the performance of the MRPCM. When the PIN diodes of the two layers are turned on, the MRPCM will reflect and convert the incident wave into cross-polarization. When the PIN diodes of the two layers are turned off, the dual-polarization incident waves are transmitted through the MRPCM without conversion. If the PIN diodes of the two layers are in different state, the x-(OFF-ON) and y-polarized (ON-OFF) incident waves are transmitted and their E-field are rotated by 90 • , respectively. Both numerical simulations and experimental results show good reconfigurable performance of the MRPCM

show abstract

“…Actually, chiral MM based polarization converters are particularly attractive in THz frequency regime due to the lack of naturally responding THz materials. Till now, single-functional linear-to-linear [31,32] or linear-to-circular [33,34] THz polarization converters have been discussed a lot. However, reports on multifunctional polarization converters in THz regime are relatively few, in addition, most reported ones are based on dynamically modulated materials.…”

Section: Introductionmentioning

confidence: 99%

Polarization-controlled multifunctional polarization conversion in bilayer chiral metamaterials

Luan

Zhang

Gao

et al. 2022

Preprint

View full text Add to dashboard Cite

In this paper, a chiral metamaterial (MM) structure composed of bilayer twisted split-ring resonator (SRR) arrays is proposed and demonstrated to realize polarization-controlled, dual-directional, and multifunctional polarization conversion for terahertz (THz) waves. Simulated results show that the converter can selectively achieve linear-to-linear, or linear to left-handed circular, or linear to right-handed circular’s polarization conversion according to the polarization state and propagating direction of the incident THz wave. Stokes parameters, ellipticity, and polarized rotation angle are introduced to determine the polarization states of the output waves. The circular polarization transmission coefficients and surface current distributions at the resonance frequency points are simulated to explain and demonstrate the physical origin of polarization conversion. The proposed multifunctional converter can find potential applications in THz sensing, imaging and communication areas.

show abstract

Broadband asymmetric transmission and polarization conversion of a linearly polarized wave based on chiral metamaterial in terahertz region

Cited by 34 publications

References 30 publications

Ultra-wideband, Wide Angle, Asymmetric Transmission based Chiral Metasurface for C and X Band Applications

Ultra-wideband, Wide Angle, Asymmetric Transmission based Chiral Metasurface for C and X Band Applications

Design of a Multifunctional Reconfigurable Metasurface for Polarization and Propagation Manipulation

Polarization-controlled multifunctional polarization conversion in bilayer chiral metamaterials

Contact Info

Product

Resources

About