An antenna-coupled split-ring resonator for biosensing

Torun, Hamdi; Top, Furkan C.; Dündar, Günhan

doi:10.1063/1.4896261

Cited by 78 publications

(47 citation statements)

References 24 publications

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“…When the time varying magnetic field penetrates the SRR, currents are induced in the rings and flow in the same direction [9]. We can express the resonant frequency of SRR as [10] ; C = C g + C s;…”

Section: A Split Ring Resonatormentioning

confidence: 99%

Detection of Water Quality using Defected Ground Double Split Ring Resonator

2019

IJRTE

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Water is an essential thing for life. Now days due to population growth and pollution, the quality of water is degraded. In this paper, a single element double split ring resonator (DSRR) has been presented as a sensor to detect the quality of water. Here, two square shape metallic split rings are designed along with the microstrip line. On the back side of the substrate, defected ground structure (DGS) is introduced. The resonant frequency of the resonator is 11.12 GHz. Quality of water is detected by the shift in S21 resonant frequency with the variation in transmission coefficient. This sensor can be used in our daily life to detect the quality of water and it may be useful in medical field also

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Section: A Split Ring Resonatormentioning

confidence: 99%

Detection of Water Quality using Defected Ground Double Split Ring Resonator

2019

IJRTE

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“…The resistance R models the dielectric losses incurred in the substrate. The resonant frequency of the equivalent circuit shown in Figure is calculated as,

f_{r} = \frac{1}{2 π \sqrt{L_{R} ((), C_{R} + C_{C})}}

…”

Section: Sensor Designmentioning

confidence: 99%

Microwave subsurface imaging of dielectric structures using fractal geometries of complementary split ring resonators

Govind

Akhtar

2018

Int J RF Microw Comput Aided Eng

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In this paper, newly proposed complementary split ring resonator (CSRR) structures of fractal geometries are used for microwave imaging of coated dielectric structures in order to detect concealed voids or similar inclusions. The proposed fractal‐based CSRR structures are found to display improved sensitivity as compared to the conventional square CSRR sensors of same cross‐sectional dimensions, and thus appear to be more appropriate for imaging applications. Detailed analyses of different orders of square Sierpinski fractals have been carried out. Raster scanning of the test region is performed and various parameters such as the magnitude and phase at unloaded resonant frequency, along with the shift in resonant frequency when loaded with the test structure are measured. Furthermore, both qualitative and quantitative images of the test structure are retrieved in terms of all the three measured parameters. Simulation and experimental results demonstrate the applicability of the proposed sensor for microwave imaging.

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“…Terahertz metamaterials (THz MMs) are good candidates as sensors for the detection of chemicals, biomaterials, [1][2][3][4][5] temperature, [ 6 ] strain, [ 7 ] alignment, and position. [ 8 ] THz MMs can also be used as frequency-agile devices [ 9,10 ] by adding a dielectric material around the MMs.…”

Section: Introductionmentioning

confidence: 99%

Displacement Current Mediated Resonances in Terahertz Metamaterials

Liu

Agarwal

Zhang

et al. 2016

Advanced Optical Materials

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devices, their relatively low Q-factors (typically below 20 of single-ring resonator MMs) [ 11,13 ] compared to micro-and nanoscale mechanical resonators (typically between 10 4 and 10 7 ) [ 14 ] impose a limitation on their sensitivities.One of the approaches to increase the Q-factor of MMs is to reduce the energy losses of MMs and substrates by optimizing the material properties and structures of the MMs. [ 15 ] There are typically three main energy loss mechanisms: Ohmic loss of MMs, [ 16 ] dielectric loss of the substrate, [ 17 ] and radiation loss of MMs. [ 18 ] The most common method to increase Q-factor of MMs without changing material properties is to design asymmetric split resonators (ASRs) by breaking the symmetry of the MMs. [ 19,20 ] The asymmetric design reduces the radiation loss of the resonator and increases Q-factor up to 30. [21][22][23][24] Another method uses coupling between MMs in a super unit to excite both odd and even modes of the MMs. This approach improves Q-factor by a factor of 5 compared to typical fi lm-based MMs. [ 25 ] The Q-factor of THz MMs needs to be further enhanced (10-20 times) to meet the requirement of ultrasensitive sensors with high selectivity. In the present study, we introduce novel nanopillar-based THz split ring resonator (SRR) MMs, utilizing displacement current in the dielectric medium between nanopillars that signifi cantly increases energy storage in the MMs, leading to enhanced Q-factor up to about 450 (about 30 times higher than that of typical thin-fi lm-based MMs). A metallic nanopillar array is designed in the form of a single gap (C-shape) SRR. Vacuum or dielectric materials of different permittivities are fi lled between the nanopillars to form nanoscale dielectric gaps. The size of the dielectric gaps varies from a few nanometers up to tens of nanometers. Since the use of nanopillars offers large surface area, the total electric charge separation (+ q and − q ) on the collective surfaces increases, resulting in the increase in electrostatic energy stored in the MMs, which leads to signifi cantly enhanced Q-factor. In addition, dielectric nanogaps reduce the Ohmic loss generated by the current circulating in the metal conductor, thus the total energy loss of MMs is reduced, which further enhances the Q-factor of the MMs. Hence, high Q-factor up to about 450 can be observed in the nanopillar-based SRR MMs, which means that they are much more sensitive than typical thin-fi lm-based MMs.Terahertz metamaterials (THz MMs) have been proven to be good candidates for chemical, biological, temperature, strain, and position sensing. However, currently developed thin-metal-fi lm-based split ring resonator (SRR) MMs have relatively low quality factor (Q-factors), leading to a poor sensitivity, which is one of the obstacles for development of sensors. In order to enhance the Q-factor, novel THz MMs, nanopillar-based MMs, are designed, fabricated, and characterized. The nanopillar-based MMs excite the inductivecapacitive resonance via desplacement currents, showing a...

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An antenna-coupled split-ring resonator for biosensing

Cited by 78 publications

References 24 publications

Detection of Water Quality using Defected Ground Double Split Ring Resonator

Detection of Water Quality using Defected Ground Double Split Ring Resonator

Microwave subsurface imaging of dielectric structures using fractal geometries of complementary split ring resonators

Displacement Current Mediated Resonances in Terahertz Metamaterials

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