scholarly journals The effects of geometrical parameters on resonance frequency of Inverted Split Ring Resonators (ISRRs)

2021 ◽  
Vol 9 (3) ◽  
pp. 67-71
Author(s):  
İsmail YARİÇİ ◽  
Yavuz ÖZTÜRK
Keyword(s):  
Resonance Frequency ◽  
Ring Resonators ◽  
Geometrical Parameters ◽  
Split Ring ◽  
Split Ring Resonators

scholarly journals Design and evaluation of split-ring resonators for aptamer-based biosensors

2018 ◽  
Vol 7 (1) ◽  
pp. 101-111 ◽  
Author(s):  
Tobias Reinecke ◽  
Johanna-Gabriela Walter ◽  
Tim Kobelt ◽  
André Ahrens ◽  
Thomas Scheper ◽  
...  
Keyword(s):  
Resonance Frequency ◽  
Split Ring Resonator ◽  
Target Protein ◽  
Ring Resonators ◽  
Split Ring ◽  
Split Ring Resonators ◽  
Molecular Binding ◽  
Novel Approach ◽  
Highly Sensitive ◽  
Line Theory

Abstract. Split-ring resonators are electrical circuits, which enable highly sensitive readout of split capacity changes via a measurement of the shift in the resonance frequency. Thus, functionalization of the split allows the development of biosensors, where selective molecular binding causes a change in permittivity and therefore a change in split capacity. In this work, we present a novel approach using transmission line theory to describe the dependency between permittivity of the sample and resonance frequency. This theory allows the identification of all relevant parameters of a split-ring resonator and thus a target-oriented optimization process. Hereby all setup optimizations are verified with measurements. Subsequently, the split of a resonator is functionalized with aptamers and the sensor response is investigated. This preliminary experiment shows that introducing the target protein results in a shift in the resonance frequency caused by a permittivity change due to aptamer-mediated protein binding, which allows selective detection of the target protein.

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 Tuning of resonance frequency in array of split-ring resonators in terahertz range

2014 ◽  
Vol 54 (1) ◽  
pp. 15-19 ◽  
Author(s):  
Gediminas Šlekas ◽  
Žilvinas Kancleris ◽  
Dalius Seliuta
Keyword(s):  
Resonance Frequency ◽  
Terahertz Range ◽  
Ring Resonators ◽  
Split Ring ◽  
Split Ring Resonators

Properties and Numerical Simulation of Electromagnetic Meta-Materials (SRR) Based on Ceramic Substrate

2008 ◽  
Vol 368-372 ◽  
pp. 570-572
Author(s):  
Bo Du ◽  
Q. Zhao ◽  
Ji Zhou ◽  
L. Kang
Keyword(s):  
Numerical Simulation ◽  
Dielectric Constant ◽  
Composite Materials ◽  
Resonance Frequency ◽  
Ceramic Substrate ◽  
Ring Resonators ◽  
Split Ring ◽  
Split Ring Resonators ◽  
Theoretical Design ◽  
Permittivity And Permeability

Electromagnetic meta-materials are artificial and periodical materials which both the permittivity and permeability are simultaneously negative. Electromagnetic meta-materials represent a new concept where composite materials are designed to display particular properties. The work which we had finished includes theoretical design and numerical simulation of the structure, fabrication of the samples and measurement of the properties. We designed electromagnetic meta-materials which composed by periodic split ring resonators (SRR) based on ceramics and then researched the influence by microwave guide. It is showed that the resonance frequency of meta-materials can be adjusted by dielectric constant and thickness of ceramic substrate.

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