scholarly journals Broadband THz Absorption of Microbolometer Array Integrated with Split-Ring Resonators

2020 ◽  
Vol 15 (1) ◽  
Author(s):  
Shuming Fan ◽  
Jun Gou ◽  
Qingchen Niu ◽  
Zheyuan Xie ◽  
Jun Wang
Keyword(s):  
Periodic Structure ◽  
Wide Spectrum ◽  
Wide Frequency Range ◽  
Ring Resonators ◽  
Split Ring ◽  
Small Unit ◽  
Split Ring Resonators ◽  
Wave Absorption ◽  
Thz Wave ◽  
Thz Absorption

AbstractIn this paper, a periodic structure based on metallic split-ring resonators is integrated into micro-bridge structures of THz microbolometer array to achieve high THz wave absorption in a wide frequency range. With a small unit size of 35 μm × 35 μm, the effect of split-ring structure on THz wave absorption characteristics of the multilayer structure array is studied to manipulate the resonance absorption frequencies. The absorption bandwidth is effectively increased by integrating a combined structure of split-ring and metallic disk. Broadband THz absorption is formed by coupling the absorption peaks of different structures. The periodic structure of dual-ring combined with a metallic disk provides a broadband THz wave absorption in the range of 4–7 THz. The highest absorption in the band reaches 90% and the lowest absorption is higher than 40%. The designed structure is process-compatible and easy to implement for small-pixel THz microbolometers with high absorption in a wide spectrum range. The research provides a scheme for broadband THz sensing and real-time imaging at room temperature.

Tunable THz wave absorption by graphene-assisted plasmonic metasurfaces based on metallic split ring resonators

2016 ◽  
Vol 19 (1) ◽  
Author(s):  
Arash Ahmadivand ◽  
Raju Sinha ◽  
Mustafa Karabiyik ◽  
Phani Kiran Vabbina ◽  
Burak Gerislioglu ◽  
...  
Keyword(s):  
Ring Resonators ◽  
Split Ring ◽  
Split Ring Resonators ◽  
Wave Absorption ◽  
Thz Wave

scholarly journals Design and Fabrication of a Novel Wideband DNG Metamaterial with the Absorber Application in Microwave X-Band

2017 ◽  
Vol 2017 ◽  
pp. 1-8 ◽  
Author(s):  
Ahmed Mahmood ◽  
Gölge Ögücü Yetkin ◽  
Cumali Sabah
Keyword(s):  
Periodic Structure ◽  
Absorption Rate ◽  
Experimental Results ◽  
Ring Resonators ◽  
Double Negative ◽  
Negative Behavior ◽  
Split Ring ◽  
Wide Bandwidth ◽  
Split Ring Resonators ◽  
X Band

A novel metamaterial, which exhibits a wideband double negative behavior in X-band, is proposed, designed, and investigated in this paper. The metamaterial is composed of modified S-shaped split-ring resonators (S-SRR). The periodic structure is designed and simulated using CST MWs. Next, the experiments are carried out, and it is shown that the simulation and the experimental results agree well and the designed structure has a wide bandwidth in X-band. An absorber application of this metamaterial is also provided, and the structure can be used as an absorber with absorption rate of over 80% for the polarization angles between 0° and 40°.

scholarly journals Terahertz sensor with resonance enhancement based on square split-ring resonators

IEEE Access ◽  
2021 ◽  
pp. 1-1
Author(s):  
Zhonggang Xiong ◽  
Liping Shang ◽  
Jieping Yang ◽  
Linyu Chen ◽  
Jin Guo ◽  
...  
Keyword(s):  
Ring Resonators ◽  
Split Ring ◽  
Split Ring Resonators ◽  
Resonance Enhancement

scholarly journals Passively Tunable Terahertz Filters Using Liquid Crystal Cells Coated with Metamaterials

Coatings ◽  
2021 ◽  
Vol 11 (4) ◽  
pp. 381
Author(s):  
Wei-Fan Chiang ◽  
Yu-Yun Lu ◽  
Yin-Pei Chen ◽  
Xin-Yu Lin ◽  
Tsong-Shin Lim ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Ring Resonators ◽  
Maximum Frequency ◽  
Split Ring ◽  
Split Ring Resonators ◽  
Terahertz Region ◽  
Resonance Frequencies ◽  
Terahertz Communication ◽  
Terahertz Sensing ◽  
Crystal Cells

Liquid crystal (LC) cells that are coated with metamaterials are fabricated in this work. The LC directors in the cells are aligned by rubbed polyimide layers, and make angles θ of 0°, 45°, and 90° with respect to the gaps of the split-ring resonators (SRRs) of the metamaterials. Experimental results display that the resonance frequencies of the metamaterials in these cells increase with an increase in θ, and the cells have a maximum frequency shifting region of 18 GHz. Simulated results reveal that the increase in the resonance frequencies arises from the birefringence of the LC, and the LC has a birefringence of 0.15 in the terahertz region. The resonance frequencies of the metamaterials are shifted by the rubbing directions of the polyimide layers, so the LC cells coated with the metamaterials are passively tunable terahertz filters. The passively tunable terahertz filters exhibit promising applications on terahertz communication, terahertz sensing, and terahertz imaging.

Applications of metamaterial sensors: a review

2021 ◽  
pp. 1-15
Author(s):  
Divya Prakash ◽  
Nisha Gupta
Keyword(s):  
Electromagnetic Interaction ◽  
High Sensitivity ◽  
Ring Resonators ◽  
Electromagnetic Properties ◽  
Physical Parameters ◽  
Split Ring ◽  
Split Ring Resonators ◽  
Quality Testing ◽  
Properties Of Materials ◽  
Metamaterial Absorbers

Abstract Sensors based on metamaterial absorbers are very promising when it comes to high sensitivity and quality factor, cost, and ease of fabrication. The absorbers could be used to sense physical parameters such as temperature, pressure, density as well as they could be used for determining electromagnetic properties of materials and their characterization. In this work, an attempt has been made to explore the various possible applications of these sensors. Metamaterial-based sensors are very popular for its diverse applications in areas such as biomedical, chemical industry, food quality testing, agriculture. Split-ring resonators with various shapes and topologies are the most frequently used structures where the sensing principle is based on electromagnetic interaction of the material under test with the resonator. Overcoming the design challenges using metamaterial sensors involving several constraints such as cost, compactness, reusability, ease in fabrication, and robustness is also addressed.

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