Multiple-band terahertz filter device using coupling effect of two nest metallic split-ring resonators

2020 ◽  
Vol 34 (21) ◽  
pp. 2050211
Author(s):  
Pengcheng Lou ◽  
Chao Tang ◽  
Qingshan Niu ◽  
Yuanhao He ◽  
Ben-Xin Wang
Keyword(s):  
Coupling Effect ◽  
Design Method ◽  
Ring Resonators ◽  
Quality Factors ◽  
Terahertz Waves ◽  
Split Ring ◽  
Split Ring Resonators ◽  
Nested Design ◽  
Multiple Band ◽  
Terahertz Filter

Multiple-band terahertz filter device consisting of two different-sized metallic split rings with the nested design method is proposed and investigated in this paper. Five separated filtering resonant dips having different resonance amplitudes and quality factors are gained, which are mainly attributed to the hybrid coupling effect between the two nested split-ring resonators. More importantly, the resonance features of the five filtering dips show a significant dependence on the designed parameters, especially the gap between two nested split rings. The multiple-band filtering resonance device given here can open up new avenues to control terahertz waves in many technology-related fields.

scholarly journals Microwave filters based on novel dielectric split‐ring resonators with high unloaded quality factors

2018 ◽  
Vol 12 (8) ◽  
pp. 1389-1394 ◽  
Author(s):  
Ahmed S. Noori ◽  
Xiaobang Shang ◽  
Cheng Guo ◽  
Timothy J. Jackson ◽  
Paul A. Smith ◽  
...  
Keyword(s):  
Microwave Filters ◽  
Ring Resonators ◽  
Quality Factors ◽  
Split Ring ◽  
Split Ring Resonators

Magnetic coupling effect of Mie resonance-based metamaterial with inclusion of split ring resonators

2015 ◽  
Vol 646 ◽  
pp. 680-684 ◽  
Author(s):  
Ke Bi ◽  
Lingyu Zeng ◽  
Hao Chen ◽  
Chang Fang ◽  
Qingmin Wang ◽  
...  
Keyword(s):  
Coupling Effect ◽  
Magnetic Coupling ◽  
Ring Resonators ◽  
Split Ring ◽  
Split Ring Resonators ◽  
Mie Resonance

scholarly journals Optically Tunable Terahertz Metasurfaces Using Liquid Crystal Cells Coated with Photoalignment Layers

Crystals ◽  
2021 ◽  
Vol 11 (9) ◽  
pp. 1100
Author(s):  
Yi-Hong Shih ◽  
Xin-Yu Lin ◽  
Harry Miyosi Silalahi ◽  
Chia-Rong Lee ◽  
Chia-Yi Huang
Keyword(s):  
Liquid Crystal ◽  
Resonance Frequency ◽  
Pump Beam ◽  
Frequency Tuning ◽  
Ring Resonators ◽  
Split Ring ◽  
Split Ring Resonators ◽  
Terahertz Region ◽  
Crystal Cells ◽  
Terahertz Filter

An optically tunable terahertz filter was fabricated using a metasurface-imbedded liquid crystal (LC) cell with photoalignment layers in this work. The LC director in the cell is aligned by a pump beam and makes angles θ of 0, 30, 60 and 90° with respect to the gaps of the split-ring resonators (SRRs) of the metasurface under various polarized directions of the pump beam. Experimental results display that the resonance frequency of the metasurface in the cell increases with an increase in θ, and the cell has a frequency tuning region of 15 GHz. Simulated results reveal that the increase in the resonance frequency arises from the birefringence of the LC, and the LC has a birefringence of 0.13 in the terahertz region. The resonance frequency of the metasurface is shifted using the pump beam, so the metasurface-imbedded LC cell with the photoalignment layers is an optically tunable terahertz filter. The optically tunable terahertz filter is promising for applications in terahertz telecommunication, biosensing and terahertz imaging.

scholarly journals Two-Channel VO2 Memory Meta-Device for Terahertz Waves

Nanomaterials ◽  
2021 ◽  
Vol 11 (12) ◽  
pp. 3409
Author(s):  
Xueguang Lu ◽  
Bowen Dong ◽  
Hongfu Zhu ◽  
Qiwu Shi ◽  
Lu Tang ◽  
...  
Keyword(s):  
Communication Systems ◽  
Storage Capacity ◽  
Single Channel ◽  
Ring Resonators ◽  
Strongly Correlated ◽  
Terahertz Waves ◽  
Split Ring ◽  
Split Ring Resonators ◽  
Insulator Metal Transition ◽  
External Power

Vanadium oxide (VO2), as one of the classical strongly correlated oxides with a reversible and sharp insulator-metal transition (IMT), enables many applications in dynamic terahertz (THz) wave control. Recently, due to the inherent phase transition hysteresis feature, VO2 has shown favorable application prospects in memory-related devices once combined with metamaterials or metasurfaces. However, to date, VO2-based memory meta-devices are usually in a single-channel read/write mode, which limits their storage capacity and speed. In this paper, we propose a reconfigurable meta-memory based on VO2, which favors a two-channel read/write mode. Our design consists of a pair of large and small split-ring resonators, and the corresponding VO2 patterns are embedded in the gap locations. By controlling the external power supply, the two operation bands can be controlled independently to achieve at least four amplitude states, including “00”, “01”, “10”, and “11”, which results in a two-channel storage function. In addition, our research may provide prospective applications in fields such as THz switching, photon storage, and THz communication systems in the future.

Experimental observation of the electric coupling effect in split ring resonators and the prevention

2007 ◽  
Vol 204 (12) ◽  
pp. 3975-3978 ◽  
Author(s):  
V. D. Lam ◽  
J. B. Kim ◽  
S. J. Lee ◽  
D. F. Wang ◽  
Y. P. Lee
Keyword(s):  
Experimental Observation ◽  
Coupling Effect ◽  
Ring Resonators ◽  
Split Ring ◽  
Split Ring Resonators ◽  
Electric Coupling

scholarly journals A Compact 5G Decoupling MIMO Antenna Based on Split-Ring Resonators

2019 ◽  
Vol 2019 ◽  
pp. 1-10 ◽  
Author(s):  
Ziyu Xu ◽  
Qisheng Zhang ◽  
Linyan Guo
Keyword(s):  
Antenna Array ◽  
Mutual Coupling ◽  
Coupling Effect ◽  
Antenna System ◽  
Ring Resonators ◽  
Split Ring ◽  
Split Ring Resonators ◽  
Mimo Antenna ◽  
Compact Size ◽  
5 Ghz

A compact planar multiple-input multiple-output (MIMO) antenna array for 5G band is proposed in this paper. To improve the isolation of compact microstrip antenna array, this paper mainly presents an electromagnetic resonant ring method for MIMO antenna array. The proposed antenna can cover both the 3.3-3.6 GHz and 4.8-5 GHz bands proposed for the 5G band. The antenna proposed in this paper consists of two symmetrical meandered monopole radiators, grid structures, and a Y-shape element. Two different sizes of split-ring resonators (SRRs) are used to suppress the interference of the coupled signal to the antenna system; thereby it can reduce the mutual coupling effect. The experimental results show that the mutual coupling between the two elements is below -25 dB in both of the bands after adding the SRRs. And this antenna is only 23×19 mm2. Its compact size and structure can be used as a mobile terminal antenna.

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