scholarly journals Achieving broadband absorption and polarization conversion with a vanadium dioxide metasurface in the same terahertz frequencies

2020 ◽  
Vol 28 (8) ◽  
pp. 12487 ◽  
Author(s):  
Zhengyong Song ◽  
Jiahe Zhang
Keyword(s):  
Vanadium Dioxide ◽  
Polarization Conversion ◽  
Broadband Absorption ◽  
Terahertz Frequencies

Reflective and transmissive cross-polarization converter for terahertz wave in a switchable metamaterial

2021 ◽  
Author(s):  
Yuanyuan Jiang ◽  
Man Zhang ◽  
Weihua Wang ◽  
Zhengyong Song
Keyword(s):  
Vanadium Dioxide ◽  
High Efficiency ◽  
Incident Angle ◽  
Terahertz Wave ◽  
Polarization Conversion ◽  
Cross Polarization ◽  
Polarization Converter ◽  
Metallic Grating ◽  
Vanadium Dioxide Film ◽  
Wave Conversion

Abstract Utilizing the phase transition characteristic of vanadium dioxide, we present a metamaterial configuration to achieve both reflective and transmissive cross-polarization converters. When vanadium dioxide is metal, the design behaves as a reflective cross-polarization converter. It consists of metallic grating, topas spacer, and vanadium dioxide film. Polarization conversion ratio is more than 90% in the frequency range from 4.80 THz to 13.13 THz. When vanadium dioxide is insulator, the design behaves as a transmissive cross-polarization converter using cascaded metallic gratings with rotation angle . High-efficiency broadband cross-polarization wave conversion is achieved in the frequency band of 0.50-4.75 THz. The effects of oblique incidence on reflective and transmissive modes are studied on polarization conversion. The results tell that cross-polarization conversion is better when incident angle is in the range of -. The designed metamaterial may have a certain inspiration for the research of terahertz multifunctional polarization converter.

Vanadium Dioxide Integrated Metasurfaces with Switchable Functionalities at Terahertz Frequencies

2018 ◽  
Vol 6 (9) ◽  
pp. 1701204 ◽  
Author(s):  
Fei Ding ◽  
Shuomin Zhong ◽  
Sergey I. Bozhevolnyi
Keyword(s):  
Vanadium Dioxide ◽  
Terahertz Frequencies

scholarly journals Switchable and Dual-Tunable Multilayered Terahertz Absorber Based on Patterned Graphene and Vanadium Dioxide

Micromachines ◽  
2021 ◽  
Vol 12 (6) ◽  
pp. 619
Author(s):  
Hongyao Liu ◽  
Panpan Wang ◽  
Jiali Wu ◽  
Xin Yan ◽  
Xueguang Yuan ◽  
...  
Keyword(s):  
Fermi Level ◽  
Vanadium Dioxide ◽  
High Performance ◽  
Incidence Angle ◽  
Multilayered Structure ◽  
Dual Band ◽  
Broadband Absorption ◽  
Terahertz Absorber ◽  
Polarization Insensitive ◽  
Absorption Performance

In this paper, a switchable and dual-tunable terahertz absorber based on patterned graphene and vanadium dioxide is proposed and analyzed. By controlling the Fermi level of graphene and the temperature of vanadium dioxide, the device’s function can be switched and its absorbing properties can be tuned. When the vanadium dioxide is in an insulator state, the device can be switched from near-total reflection (>97%) to ultra-broadband absorption (4.5–10.61 THz) as the Fermi level of graphene changes from 0 to 0.8 eV. When the vanadium dioxide is changed to a metal state, the device can act as a single-band absorber (when the Fermi level of graphene is 0 eV) and a dual-band absorber with peaks of 4.16 THz and 7.3 THz (when the Fermi level of graphene is 0.8 eV). Additionally, the absorber is polarization-insensitive and can maintain a stable high-absorption performance within a 55° incidence angle. The multilayered structure shows great potential for switchable and tunable high-performance terahertz devices.

scholarly journals ­­­­A THZ Tunable Metamaterial Reflective Polarization Converter Based Vanadium Oxide Film

2021 ◽  
Author(s):  
Fuyuan Yu ◽  
Xiongjun Shang ◽  
Wei Fang ◽  
Qingqing Zhang ◽  
Yan Wu ◽  
...  
Keyword(s):  
Vanadium Dioxide ◽  
Physical Mechanism ◽  
Polarization Conversion ◽  
Polarization Converter ◽  
Vanadium Dioxide Film ◽  
Metal Phase Transition ◽  
Current Densities ◽  
Tunable Metamaterial ◽  
Dioxide Film ◽  
Wave Incidence

Abstract In this paper a simple and tunable reflective polarization converter has been investigated numerically based on metamaterial which composes of a two-corner-cut square patch resonator with a slit embedded into Vanadium dioxide film (VO2) and reflective ground layer. All the results obtained by the CST Microwave Studio show that the polarization conversion ratio (PCR) above 90% is achieved from 2.22-5.42THz at the temperature about 25°C under the linearly and circularly polarized wave incidence normally. In addition, the influences on electromagnetic polarization properties have been demonstrated with the insulator-to-metal phase transition of the Vanadium dioxide film (VO2) film by the method of varying the temperature. At the same time, to be demonstrated, the physical mechanism of changeable polarization conversion has been discussed by the distributions of current densities. According to the results, the designed metamaterial could be applied in the area of temperature-controlled sensing, THz wireless communication, tunable polarized devices.

scholarly journals Reconfigurable Multifunctional Metasurface Hybridized with Vanadium Dioxide at Terahertz Frequencies

Materials ◽  
2018 ◽  
Vol 11 (10) ◽  
pp. 2040 ◽  
Author(s):  
Ling Wang ◽  
Weijun Hong ◽  
Li Deng ◽  
Shufang Li ◽  
Chen Zhang ◽  
...  
Keyword(s):  
Vanadium Dioxide ◽  
System Integration ◽  
Electromagnetic Waves ◽  
Polarization State ◽  
Single Frequency ◽  
Numerical Result ◽  
Single Function ◽  
Terahertz Frequencies ◽  
First Time ◽  
Continuous Demand

Driven by the continuous demand for system integration and device miniaturization, integrating multiple diversified functions into a single metasurface hybridized with the tunable metaparticle is highly demanding at terahertz (THz) range. However, up to now, because of the limitation of the tunable metaparticle at terahertz range, most of the metasurfaces feature a single function only or process similar functionalities at a single frequency. A reconfigurable multifunctional metasurface which can realize the switch of transmission and reflection and manipulate the linearized polarization state of electromagnetic waves simultaneously over a controllable terahertz frequency range based on the vanadium dioxide was designed for the first time in the paper. The numerical result demonstrates the validity of the appropriately designed metasurface. Simulation results show that the reconfigurable and multifunctional performance of this metasurface can be acquired over 1.59 THz to 1.74 THz without re-optimizing or re-fabricating structures, which effectively extends the operating frequencies. The proposed metasurface holds potential for electromagnetic wave manipulation and this study can motivate the realization of the wideband multifunctional metasurface and the software-driven reconfigurable metasurface at terahertz frequencies.

Dual‐band reconfigurable coding metasurfaces hybridized with vanadium dioxide for wavefront manipulation at terahertz frequencies

2019 ◽  
Vol 61 (12) ◽  
pp. 2847-2853
Author(s):  
Hongjun Wang ◽  
Li Deng ◽  
Chen Zhang ◽  
Meijun Qu ◽  
Ling Wang ◽  
...  
Keyword(s):  
Vanadium Dioxide ◽  
Dual Band ◽  
Terahertz Frequencies

Tunable multiband polarization conversion and manipulation in vanadium dioxide-based asymmetric chiral metamaterial

2018 ◽  
Vol 11 (4) ◽  
pp. 042004 ◽  
Author(s):  
Shichao Song ◽  
Xiaoliang Ma ◽  
Mingbo Pu ◽  
Xiong Li ◽  
Zuojun Zhang ◽  
...  
Keyword(s):  
Vanadium Dioxide ◽  
Polarization Conversion ◽  
Chiral Metamaterial
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