Ultra-wideband high-efficiency reflective linear-to-circular polarization converter based on metasurface at terahertz frequencies.
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TLDR
Results indicate that the relative bandwidth reaches 80% and the efficiency is greater than 88%, thus, ultra-wideband high-efficiency LTC polarization conversion has been realized and the physical mechanism of the polarization conversion is revealed.Abstract:
The polarization conversion of electromagnetic (EM) waves, especially linear-to-circular (LTC) polarization conversion, is of great significance in practical applications. In this study, we propose an ultra-wideband high-efficiency reflective LTC polarization converter based on a metasurface in the terahertz regime. It consists of periodic unit cells, each cell of which is formed by a double split resonant square ring, dielectric layer, and fully reflective gold mirror. In the frequency range of 0.60 - 1.41 THz, the magnitudes of the reflection coefficients reach approximately 0.7, and the phase difference between the two orthogonal electric field components of the reflected wave is close to 90° or -270°. The results indicate that the relative bandwidth reaches 80% and the efficiency is greater than 88%, thus, ultra-wideband high-efficiency LTC polarization conversion has been realized. Finally, the physical mechanism of the polarization conversion is revealed. This converter has potential applications in antenna design, EM measurement, and stealth technology.read more
Citations
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Wideband Metasurface-Based Reflective Polarization Converter for Linear-to-Linear and Linear-to-Circular Polarization Conversion
Qi Zheng,Chenjiang Guo,Jun Ding +2 more
TL;DR: In this paper, a wideband reflective polarization converter based on metasurface is proposed, which can transform a linearly polarized (LP) incident electromagnetic (EM) wave into its orthogonal LP reflection wave in a lower band, and a circularly polarized (CP) reflector in a higher band.
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Terahertz broadband tunable reflective cross-polarization convertor based on complementary cross-shaped graphene metasurface
TL;DR: In this paper, a broadband tunable reflective polarization convertor using a single layer complementary-cross-shaped (CCS) graphene metasurface was proposed and investigated numerically in terahertz (THz) region.
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An Ultra-Wideband Reflective Linear-to-Circular Polarization Converter Based on Anisotropic Metasurface
TL;DR: A detailed theoretical analysis is presented, in which the conclusion is reached that in the case of neglecting thelittle dielectric loss, the axial ratio of the reflected wave can be completely determined by the phase difference between the two reflection coefficients at both the ultra-wideband and high-efficiency polarization converter.
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Ultra-Broadband Polarization Conversion Meta-Surface and its Application in Polarization Converter and RCS Reduction
TL;DR: The proposed ultra-broadband and high-efficiency polarization conversion metasurface has excellent performance in flexibly controlling terahertz wave reflection and low Radar Cross Section (RCS) and provides new degrees of freedom for studying teraHertz wave manipulation and reducing RCS.
Journal ArticleDOI
Graphene-Based High-Efficiency Broadband Tunable Linear-to-Circular Polarization Converter for Terahertz Waves
TL;DR: In this article, a high-efficiency graphene-based ultra-thin metasurface manifesting linear-to-circular (LTC) polarization conversion for THz wave was presented.
References
More filters
Journal ArticleDOI
Ultrawideband and High-Efficiency Linear Polarization Converter Based on Double V-Shaped Metasurface
TL;DR: In this paper, a double V-shaped metasurface that can efficiently convert linear polarizations of electromagnetic (EM) waves in wideband is proposed, which can be used in many applications, such as reflector antennas, imaging systems, remote sensors, and radiometers.
Journal ArticleDOI
Functional and nonlinear optical metasurfaces
Alexander Minovich,Andrey E. Miroshnichenko,Anton Yu. Bykov,Tatiana V. Murzina,Dragomir N. Neshev,Yuri S. Kivshar +5 more
TL;DR: In this article, the most interesting properties of photonic metasurfaces are reviewed, demonstrating their useful functionalities such as frequency selectivity, wavefront shaping, polarization control, etc.
Journal ArticleDOI
A perfect metamaterial polarization rotator
Longqing Cong,Wei Cao,Xueqian Zhang,Zhen Tian,Jianqiang Gu,Ranjan Singh,Jiaguang Han,Weili Zhang +7 more
TL;DR: In this paper, a unique approach to efficiently rotate the linear polarization of terahertz wave in a broadband configuration with tri-layer metasurfaces was proposed, where the Fabry-Perot cavity effect was attributed to the underlying mechanism of high transmittance and polarization rotation.
Journal ArticleDOI
Achieving wide-band linear-to-circular polarization conversion using ultra-thin bi-layered metasurfaces
TL;DR: In this article, a bi-layered linear-to-circular (LTC) polarization conversion metasurface operating in 11.4-14.3 GHz is designed and fabricated, which is composed of two layers of metallic pattern arrays separated by a 1.5mm-thick dielectric spacer.
Journal ArticleDOI
Independently tunable dual-band perfect absorber based on graphene at mid-infrared frequencies
Yuping Zhang,Tongtong Li,Qi Chen,Huiyun Zhang,John F. O'Hara,Ethan Abele,Antoinette J. Taylor,Hou-Tong Chen,Abul Kalam Azad +8 more
TL;DR: A dual-band absorber formed by combining two cross-shaped metallic resonators of different sizes within a super-unit-cell arranged in mirror symmetry is designed, which enables a promising way to design electrically tunable absorbers, which may contribute toward the realization of frequency selective detectors for sensing applications.