1 Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, China 2 College of Materials Science and Opto-Electronic Technology, University of Chinese Academy of Sciences, Beijing 100049, China 3 Beijing Key Laboratory of Inorganic Stretchable and Flexible Information Technology, Beijing 100083, China
Terahertz polarization devices are an important part of terahertz optical systems. Traditional terahertz polarization devices rely on birefringent crystals, and their performances are limited by the material structures. In this work, we theoretically demonstrate that the metamaterial consisting of the medium and the periodic metal band embedded in the medium can control broadband polarization effectively. The transmission length of the subwavelength waveguide mode gives rise to a broadband transmission peak. The resonant cavity structure formed by the dielectric layer and the waveguide layer possesses a high transmission efficiency. By optimizing the metamaterial structure parameters, we design a high-efficient (>90%) quarter-wave plate over a frequency range of 0.90 THz–1.10 THz and a high-efficient (>90%) half-wave plate over a frequency range of 0.92 THz–1.02 THz. Besides, due to the anisotropy of the structure, the metamaterials with the same structural parameters can achieve the function of the polarized beam splitting with an efficiency of up to 99% over a frequency range of 0.10 THz–0.55 THz. Therefore, the designed metamaterial has a multifunctional polarization control effect, which has potential applications in the terahertz integrated polarization optical system.
Received: 17 July 2020
Revised: 14 August 2020
Accepted manuscript online: 09 September 2020
Fund: the National Key Research and Development Plan, China (Grant No. 2016YFB0402402), the Strategic Priority Research Program of the Chinese Academy of Sciences (Grant No. XDB43010000), the National Key Research and Development Project, China (Grant No. 2016YFB0400601), the National Basic Research Program of China (Grant No. 2015CB351902), the National Science and Technology Major Project, China (Grant No. 2018ZX01005101- 010), the National Natural Science Foundation of China (Grant Nos. 61835011and U1431231), the Key Research Projects of Frontier Science of the Chinese Academy of Sciences (Grant No. QYZDY-SSW-JSC004), and the Beijing Science and Technology Projects (Grant No. Z151100001615042).
Xiao-Fei Jiao(焦晓飞), Zi-Heng Zhang(张子恒), Yun Xu(徐云), and Guo-Feng Song(宋国峰) Efficient and multifunctional terahertz polarization control device based on metamaterials 2020 Chin. Phys. B 29 114209
Fig. 1.
(a) Three-dimensional schematic diagram of metamaterial, and (b) cross-sectional view of structure in XZ plane.
Fig. 2.
Metamaterial transmission spectrum under TE and TM polarization incidences.
Fig. 3.
Electric field distribution in waveguide when TE is incident with waveguide length being 250 μm, metal strip 5 μm, medium width 175 μm, and incident wave frequency 0.85 THz.
Fig. 4.
Plots of TE-polarized light transmittance versus frequency for different (a) medium widths and (b) waveguide transmission lengths.
Fig. 5.
TM-polarized light frequency versus (a) medium widths and (b) waveguide transmission lengths.
Fig. 6.
Plot of TM-polarized light transmittance versus frequency at different medium refractive indices.
Fig. 7.
(a) Plot of linear transmissivity TM + TE and phase difference between electric field components TE and TM versus frequency for designed quarter-wave plat. (b) Plot of calculated ellipticity angle ζ and ellipticity χversus frequency.
Fig. 8.
(a) linear transmissivity TM + TE and phase difference between electric field components TM and TE versus frequency for designed half-wave plat. (b) Plot of calculated PRA and DoLP versus frequency.
Fig. 9.
(a) Schematic diagram of polarization beam splitter. (b) Plot of transmittance and reflectance versus frequency for TE and TM incidences.
Shah N A, Ahmad F, Syed A A, Naqvi Q A 2013 Int. J. Appl. Electromagn. Mech.43 379 DOI: 10.3233/JAE-131724
[24]
Singh R, Plum E, Menzel C, Rockstuhl C, Azad A K, Cheville R A, Lederer F, Zhang W, Zheludev N I 2009 Phys. Rev. B80 153104 DOI: 10.1103/PhysRevB.80.153104
[25]
Xu W Z, Shi Y T, Ye J, Ren F F, Shadrivov I V, Lu H, Liang L, Hu X, Jin B, Zhang R, Zheng Y, Tan H H, Jagadish C 2017 Adv. Opt. Mater.5 1700108 DOI: 10.1002/adom.201700108
[26]
Li T F, Li Y L, Zhang Z Y, Yang Q H, Fan F, Wen Q Y, Chang S J 2020 Appl. Phys. Lett.116 251102 DOI: 10.1063/5.0009704
[27]
Li Y L, Li T F, Wen Q Y, Fan F, Yang Q H, Chang S J 2020 Opt. Express28 21062 DOI: 10.1364/OE.395668
Ordal M A, Bell R J, Alexander R W, Long L L, Querry M R 1985 Appl. Opt.24 4493 DOI: 10.1364/AO.24.004493
[33]
Islam M S, Cordeiro C M B, Nine M J, Sultana J, Cruz A L S, Dinovitser A, Ng B W H, Ebendorff-Heidepriem H, Losic D, Abbott D 2020 IEEE Access8 97204 DOI: 10.1109/Access.6287639
A self-powered and sensitive terahertz photodetection based on PdSe2 Jie Zhou(周洁), Xueyan Wang(王雪妍), Zhiqingzi Chen(陈支庆子), Libo Zhang(张力波), Chenyu Yao(姚晨禹), Weijie Du(杜伟杰), Jiazhen Zhang(张家振), Huaizhong Xing(邢怀中), Nanxin Fu(付南新), Gang Chen(陈刚), and Lin Wang(王林). Chin. Phys. B, 2022, 31(5): 050701.
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