Design and Investigation of a Metamaterial Terahertz Broadband Bandpass Filter Based on Dual Metallic Rings

Wan Gao; Jianyang Wang; Qiannan Wu

doi:10.3788/LOP202158.0516001

Laser & Optoelectronics Progress, Volume. 58, Issue 5, 0516001(2021)

Design and Investigation of a Metamaterial Terahertz Broadband Bandpass Filter Based on Dual Metallic Rings

Wan Gao¹, Jianyang Wang¹, and Qiannan Wu^1,2,3,4、*

Author Affiliations

¹Department of Physics, College of Science, North University of China, Taiyuan , Shanxi 030051, China

²Nantong Institute of Intelligent Opto-Mechatronics of North University of China, Nantong , Jiangsu 226000, China

³Center for Microsystem Integration , North University of China, Taiyuan , Shanxi 030051, China

⁴Academy for Advanced Interdisciplinary Research, North University of China, Taiyuan , Shanxi 030051, China

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Abstract Get PDF(in Chinese)

Figures & Tables(12)

Fig. 1. 3D structure and parameters of the simulation unit（left） and front view structure of the resonance unit (right)

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Fig. 2. Transmission coefficient and insertion loss of terahertz filter at different inner diameters. (a) Transmission coefficient; (b) insertion loss

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Fig. 3. Transmission coefficient and insertion loss of terahertz filter at different outer diameters. (a) Transmission coefficient; (b) insertion loss

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Fig. 4. Transmission coefficient and insertion loss of terahertz filter at different outer ring widths. (a) Transmission coefficient; (b) insertion loss

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Fig. 5. Transmission coefficient and insertion loss of terahertz filter at different inner ring widths. (a) Transmission coefficient; (b) insertion loss

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Fig. 6. Transmission coefficient and insertion loss of terahertz filter at different substrate side lengths. (a) Transmission coefficient; (b) insertion loss

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Fig. 7. Transmission coefficient and insertion loss of terahertz filter at different substrate thicknesses. (a) Transmission coefficient; (b) insertion loss

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Fig. 8. Transmission coefficient and insertion loass of terahertz filter.(a) Transmission coefficient; (b) insertion loss

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Fig. 9. Electric field distribution near the filter at 0.79 THz

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Fig. 10. Surface current graphs of terahertz filter at different frequencies. (a) 0.37 THz; (b) 0.79 THz; (c) 1.06 THz

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Table 1. Design size of terahertz filter
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Table 1. Design size of terahertz filter
Parameter Value/μm
Substrate side length a 180
Substrate thickness b 40
Outer ring radius R 80
Outer ring width D 5
Inner ring radius r 20
Inner ring width d 5
Ring height h（H） 4

Table 2. Research results of terahertz filter

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Table 2. Research results of terahertz filter

Reference	Working frequency/THz	Central frequency/THz	3 dB bandwidth/THz	Insertion loss/dB	Transmittance/%
[20](2014)	0.10‒0.16	0.145	0.0052	≤0.95	-
[21](2020)	0.1‒0.6	0.42	0.16	-	≤78.0
[24](2019)	0.3‒1.1	0.56	0.29	-	≤81.7
[22](2019)	0.2‒2.0	0.69	0.39	-	≤98.0
[24](2019)	0.2‒1.8	0.66	0.15	-	≤84.4
[23](2020)	-	0.715	0.021	-	≤92.0
This paper	0‒1.2	0.79	0.54	≤2.1	≤93.0

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Wan Gao, Jianyang Wang, Qiannan Wu. Design and Investigation of a Metamaterial Terahertz Broadband Bandpass Filter Based on Dual Metallic Rings[J]. Laser & Optoelectronics Progress, 2021, 58(5): 0516001

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