SIMULATION AND ANALYSIS OF ASYMMETRIC METAMATERIAL RESONATOR-ASSISTED MICROWAVE SENSOR

Based on the field enhancement principle of trapped modes, two new asymmetric metamaterial resonators are presented. Transmission response (S21) of the rectangular wave-guide filled with an asymmetric metamaterial resonator is simulated. Results show that the asymmetric resonator possesses high Q-factor and improved sensitivity. The microwave sensor based on the asymmetric resonator can be flexibly tailored to design requirement by varying the asymmetry parameter or the topological structure of the resonator. The asymmetric metamaterial resonator-assisted microwave sensor will have potential applications in biosensor and chemosensor fields for sensing minute amounts of dielectric sample substance.

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Enhanced FANO Structure Based on Tip-Field-Enhancement Theory

Applied Sciences ◽

10.3390/app9235009 ◽

2019 ◽

Vol 9 (23) ◽

pp. 5009

Author(s):

Tianchi Zhou ◽

Bo Zhang ◽

Yaxin Zhang ◽

Chao Shu ◽

Shixiong Liang ◽

...

Keyword(s):

Electromagnetic Fields ◽

Potential Application ◽

Field Enhancement ◽

Antenna Design ◽

Q Factor ◽

Split Ring ◽

High Q ◽

Time Harmonic ◽

Microfluidic Sensors ◽

Simulation Results

High-Q metasurfaces have attracted much interest owing to their potential application in biological sensors. FANO is a type of high-Q factor metasurface. However, it is difficult to achieve large resonant intensity and a high-Q factor at the same time. In this paper, by sharpening the tips of the asymmetrical split-ring FANO structure and letting more charges stack at the tips to enhance tip coupling, the Q factor was significantly improved without sacrificing too much resonant intensity. Simulation results showed that the Q factor increased up to 2.4 times, while the resonant intensity stayed higher than 20 dB, and the experiment results agreed with the simulations. This indicated that the tip-field-enhancement theory can be applied in time-harmonic electromagnetic-fields, and the method proposed here can be used to increase the sensitivity and accuracy of microfluidic sensors. Additionally, other types of research, such as on antenna design, could benefit from this theory.

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Analysis and investigation of a novel microwave sensor with high Q-factor for liquid characterization

TELKOMNIKA (Telecommunication Computing Electronics and Control) ◽

10.12928/telkomnika.v17i2.11901 ◽

2019 ◽

Vol 17 (2) ◽

pp. 1065 ◽

Cited By ~ 1

Author(s):

Ammar Alhegazi ◽

Zahriladha Zakaria ◽

Noor Azwan Shairi ◽

Tole Sutikno ◽

Rammah A. Alahnomi ◽

...

Keyword(s):

Q Factor ◽

High Q ◽

Microwave Sensor

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Analysis and Investigation of a Novel Microwave Sensor with High Q-Factor for Oil Sensing

Indonesian Journal of Electrical Engineering and Computer Science ◽

10.11591/ijeecs.v12.i3.pp1407-1412 ◽

2018 ◽

Vol 12 (3) ◽

pp. 1407 ◽

Cited By ~ 1

Author(s):

Ammar Alhegazi ◽

Zahriladha Zakaria ◽

Noor Azwan Shairi ◽

Tole Sutikno ◽

Rammah A. Alahnomi ◽

...

Keyword(s):

Linseed Oil ◽

Microfluidic Channel ◽

Coconut Oil ◽

Small Variation ◽

Cavity Resonator ◽

Q Factor ◽

High Q ◽

Oil Processing ◽

Fitting Method ◽

Microwave Sensor

<span lang="EN-US">In this paper, a novel microwave sensor with high Q-factor for oil sensing is analyzed and investigated. The new design is based on a gap waveguide cavity resonator (GWCR). To characterize and evaluate the sample, the oil under tested (OUT) is injected into a Teflon tube, which is passing through the microfluidic channel that is located in the middle of the cavity where the electric field concentrates. The results show that the proposed sensor has a high Q-factor of 4832. Moreover, the proposed design has the ability to sense and detect different types of oils with a small variation of permittivities such as Fish oil, Coconut oil, Olive oil, Linseed oil and Castor oil. The permittivity equation is extracted using the polynomial fitting method to define unknown dielectric properties of the OUT. The results show that the evaluated permittivity using the proposed sensor has a good agreement with the ideal permittivity. Therefore, the proposed sensor is a good candidate for oil processing in food industries.</span>

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Ultra-Narrow-Band Filter Based on High Q Factor in Metallic Nanoslit Arrays

Sensors ◽

10.3390/s20185205 ◽

2020 ◽

Vol 20 (18) ◽

pp. 5205

Author(s):

Ling Guo ◽

Mengran Guo ◽

Hongyan Yang ◽

Jun Ma ◽

Shouhong Chen

Keyword(s):

Narrow Band ◽

High Spectral Resolution ◽

Q Factor ◽

High Q ◽

Transmission Modes ◽

Band Filter ◽

Nanophotonic Device ◽

Narrow Band Filter ◽

Potential Applications ◽

Nanoslit Arrays

Here we propose a novel high Q ultra-narrow-band filter in the optical regime. Multiple high Q resonances are achieved in ultra-thin metallic nanoslit arrays on stacked low index–high index dielectric (LID–HID) substrate. Based on the cooperative effect of suppressed modes and transmission modes, the high spectral resolution of transmission peaks is obtained. The number and Q factor of transmission peaks can be freely manipulated by a simple combination of the stacked LID–HID. It is demonstrated that the linewidths of the transmission peaks can be reduced down to the extreme limit of 1 nm and the Q factor is up to 700 by optimizing the structure parameter of the three-layer LID–HID. The results provide a theoretical basis to design a multi-band nanophotonic device with a high Q factor and have potential applications in the next generation of high-resolution plasmonic biosensing and filtering.

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Ultra-high-Q resonances in plasmonic metasurfaces

Nature Communications ◽

10.1038/s41467-021-21196-2 ◽

2021 ◽

Vol 12 (1) ◽

Cited By ~ 2

Author(s):

M. Saad Bin-Alam ◽

Orad Reshef ◽

Yaryna Mamchur ◽

M. Zahirul Alam ◽

Graham Carlow ◽

...

Keyword(s):

Incident Light ◽

Reducing Power ◽

Field Enhancement ◽

Plasmonic Nanostructures ◽

High Q ◽

Alternative Material ◽

Order Of Magnitude ◽

Wavelength Scale ◽

Strong Confinement ◽

Sub Wavelength

AbstractPlasmonic nanostructures hold promise for the realization of ultra-thin sub-wavelength devices, reducing power operating thresholds and enabling nonlinear optical functionality in metasurfaces. However, this promise is substantially undercut by absorption introduced by resistive losses, causing the metasurface community to turn away from plasmonics in favour of alternative material platforms (e.g., dielectrics) that provide weaker field enhancement, but more tolerable losses. Here, we report a plasmonic metasurface with a quality-factor (Q-factor) of 2340 in the telecommunication C band by exploiting surface lattice resonances (SLRs), exceeding the record by an order of magnitude. Additionally, we show that SLRs retain many of the same benefits as localized plasmonic resonances, such as field enhancement and strong confinement of light along the metal surface. Our results demonstrate that SLRs provide an exciting and unexplored method to tailor incident light fields, and could pave the way to flexible wavelength-scale devices for any optical resonating application.

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High-Q-Factor Tunable Silica-Based Microring Resonators

Photonics ◽

10.3390/photonics8070256 ◽

2021 ◽

Vol 8 (7) ◽

pp. 256

Author(s):

Yue-Xin Yin ◽

Xiao-Pei Zhang ◽

Xiao-Jie Yin ◽

Yue Li ◽

Xin-Ru Xu ◽

...

Keyword(s):

Optical Communications ◽

Microring Resonator ◽

Microring Resonators ◽

Q Factor ◽

Notch Depth ◽

Critical Coupling ◽

Practical Application ◽

Coupling Condition ◽

High Q ◽

Racetrack Resonator

A high-Q-factor tunable silica-based microring resonator (MRR) is demonstrated. To meet the critical-coupling condition, a Mach–Zehnder interferometer (MZI) as the tunable coupler was integrated with a racetrack resonator. Then, 40 mW electronic power was applied on the microheater on the arm of MZI, and a maximal notch depth of about 13.84 dB and a loaded Q factor of 4.47 × 106 were obtained. The proposed MRR shows great potential in practical application for optical communications and integrated optics.

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Dielectric-loaded L-band filters for high-power space applications

International Journal of Microwave and Wireless Technologies ◽

10.1017/s1759078721000982 ◽

2021 ◽

pp. 1-11

Author(s):

Paolo Vallerotonda ◽

Fabrizio Cacciamani ◽

Luca Pelliccia ◽

Alessandro Cazzorla ◽

Davide Tiradossi ◽

...

Keyword(s):

High Power ◽

Dielectric Resonators ◽

Q Factor ◽

Rf Power ◽

Space Applications ◽

High Q ◽

Critical Issues ◽

L Band ◽

Multipactor Discharge ◽

Filter Response

Abstract The design and first experimental results of Tx and Rx L-band bandpass filters for a high-power satellite diplexer are presented in this paper. Designed in the framework of an ESA ARTES AT project, the filters are based on TM010 mode dielectric resonators. These resonators allow for better results in terms of volume occupation with respect to other dielectric resonators still maintaining high Q-factor values (>2000). Volume saving above 30% is achieved with respect to standard coaxial filters. The filter geometries and materials have been chosen in order to improve the power-handling and to cope with related critical issues for space applications (i.e. avoid any multipactor discharge in the operating RF power range and low-PIM response). Measurements of Tx filter show good correlation with the design in terms of central frequency, BW, and unloaded Q-factor (almost 3000). Measurements of Rx filter show a worse correlation with the design in terms of filter response shape. This is ascribed to size tolerances of one of the filter resonators. Multiple analyses are ongoing to remove this degradation in the final engineering model.

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