Asymmetric electromagnetic wave transmission of linear polarization via polarization conversion through chiral metamaterial structures

Huang, Ci; Feng, Yijun; Zhao, Junming; Wang, Zhengbin; Jiang, Tian

doi:10.1103/physrevb.85.195131

Cited by 305 publications

(208 citation statements)

References 23 publications

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“…To go a step further, we will demonstrate our proposed CMMs numerically and experimentally for the multi-band circular polarization conversion. Since the split-ring resonators (SRRs) allow for a control and manipulation of EM (light) waves on sub-wavelength length scales [8,12,14,15,23], which is also employed as the basic element in our design. Figs.…”

Section: Fundamental Theory and Unit-cell Structure Designmentioning

confidence: 99%

“…From microwave to optical ranges, negative refraction [1], giant gyrotropy [2], optical activity [3][4][5][6], circular dichroism (CD) [7][8][9], asymmetric transmission (AT) [10][11][12][13], and linear or/to circular polarization conversion [14][15][16] can be explored and realized by special CMM design. Essentially, these unique EM properties mainly originate from cross-coupling of the electric and magnetic fields among these chiral structures [17][18][19][20][21][22][23].…”

Section: Introductionmentioning

confidence: 99%

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Ultra-Compact Multi-Band Chiral Metamaterial Circular Polarizer Based on Triple Twisted Split-Ring Resonator

Cheng¹,

Cheng³

et al. 2016

PIER

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Abstract-An ultra-compact chiral metamaterial (CMM) using triple-layer twisted split-ring resonators (TSRRs) structure was proposed, which can function as a multi-band circular polarizer. This ultra-compact structure CMM can convert an incident linearly y-polarized (x-polarized) wave propagating along the −z(+z) direction to the transmitted left circularly polarized (LCP) waves at 7.28 GHz, 13.22 GHz and 15.49 GHz while the right circularly polarized (RCP) waves are at 9.48 GHz simultaneously. In addition, the large polarization extinction ratio (PER) of more than 20 dB across four resonance frequencies can be achieved. The experiment results are in good agreement with the numerical simulation results. The surface current distributions of the structure are analyzed to illustrate this linear to circular polarization conversion. The unit cell structure is extremely small both in longitudinal and transverse directions. Good performances and compact design of this CMM suggest promising applications in circular polarizers that need to be integrated with other compact devices.

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Section: Fundamental Theory and Unit-cell Structure Designmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Ultra-Compact Multi-Band Chiral Metamaterial Circular Polarizer Based on Triple Twisted Split-Ring Resonator

Cheng¹,

Cheng³

et al. 2016

PIER

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“…Asymmetric transmission for linear polarization is unusual and appealing polarization functionalities studied in recent years [11][12][13][14][15]. In [11], a thin structure composed of three-dimensional metaatoms allowing asymmetric transmission for an arbitrary including linear polarization of the incident electromagnetic wave was proposed without any rotational symmetry.…”

Section: Near Diodelike Asymmetric Transmission For Spectrum Filtermentioning

confidence: 99%

“…In [11], a thin structure composed of three-dimensional metaatoms allowing asymmetric transmission for an arbitrary including linear polarization of the incident electromagnetic wave was proposed without any rotational symmetry. Afterwards, theoretical prediction and experimental realization on asymmetric transmission for linear polarization only were continuously reported by using gammadion structure [11] and SRR structure [12,13], respectively. In [14], the directionally asymmetric transmission of linearly and circularly polarized waves was suggested to be manipulated via angles of incidence.…”

Section: Near Diodelike Asymmetric Transmission For Spectrum Filtermentioning

confidence: 99%

“…due to their unique electromagnetic (EM) properties and a wider set of functionalities such as giant optical activity [1], elliptical or circular dichroism [2], giant gyrotropy [3], negative refraction without simultaneous negative permittivity and permeability [4][5][6][7][8][9], and asymmetric transmission [10][11][12][13][14][15], etc. The unusual polarization functionalities and chirality not found in natural medium arise from the magneto-electric cross coupling of chiral structures due to their bianisotropy and lack of any mirror symmetry.…”

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confidence: 99%

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Dual-Band Circular Polarizer and Asymmetric Spectrum Filter Using Ultrathin Compact Chiral Metamaterial

Xu¹,

Wang²,

Qi³

et al. 2013

PIER

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Abstract-A compact chiral metamaterial is proposed and comprehensively investigated that can achieve circularly polarized wave emission from linearly polarized incident wave (giant circular dichroism) over dual bands and near Diodelike asymmetric transmission of linearly polarized waves. The chiral metamaterial also features exceptionally strong optical activity. For verification, two proof-of-concept slab samples are designed, fabricated and measured at microwave frequencies. Numerical and experimental results agree well, indicating that the former dual-band circular polarizer features high conversion efficiency around 8.1 and 9.9 GHz in addition to large polarization extinction ratio of more than 16 dB, while the latter chiral sample enables the near 90% cross-polarization transmission in one direction and almost 10% transmission in the opposite direction. The block "meta-atom" that utilized to build the ultrathin CMM slab is less than λ 0 /6.73 evaluated at operating frequency. Good performances of the two chiral slabs with simple and compact package suggest promising applications in the circular polarizers (circulators) and transparent linear polarization transformers or spectrum filters (isolators) that need to be interpreted with other compact devices.

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Polarization Modulation for Wireless Communications Based on Metasurfaces

Huang

Zhang

Cheng

et al. 2021

Adv Funct Materials

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As an alternative to conventional wireless communication techniques that use amplitude, frequency, and phase modulations, polarization modulation (PoM) provides an additional degree of freedom for the modulation of carrier waves and allows the realization of simple transceiver designs. PoM also enhances physical‐layer security in wireless communication systems owing to its vector‐attribute and direction‐dependence features. In this study, a prototype of PoM wireless communications based on a digital coding metasurface that can dynamically control the polarization of electromagnetic waves in a certain frequency band is demonstrated. The binary digital signals can be encoded on the optical rotation states of the circularly polarized beams through the real‐time control of the bias voltages applied on the metasurface and successfully decoded at the receiving end. Because the metasurface is separated from the emitting antenna, the design can simplify the setup for multichannel communications and provide more flexibility by setting the emitting antennas at different operating frequencies at any time.

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Asymmetric electromagnetic wave transmission of linear polarization via polarization conversion through chiral metamaterial structures

Cited by 305 publications

References 23 publications

Ultra-Compact Multi-Band Chiral Metamaterial Circular Polarizer Based on Triple Twisted Split-Ring Resonator

Ultra-Compact Multi-Band Chiral Metamaterial Circular Polarizer Based on Triple Twisted Split-Ring Resonator

Dual-Band Circular Polarizer and Asymmetric Spectrum Filter Using Ultrathin Compact Chiral Metamaterial

Polarization Modulation for Wireless Communications Based on Metasurfaces

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