Comparison of angular-selective metasurfaces as tools for sub-THz single-frequency sensing

Abstract We demonstrate and numerically characterize a set of single-layer metasurfaces based on capacitively-coupled bent metal strips deposited on a thin polypropylene film operating as band-stop filters at 139.1 GHz. Due to a high inter-digital coupling capacitance between neighboring inclusions formed by the strips, the resonance of the metasurface becomes highly sensitive to the incidence angle of a plane wave. At the same time, a narrow-band resonance is achieved by reducing the conductor length along the vertical polarization direction of the incident wave. We propose to use both properties for designing a sensor, which analyses the thickness of a thin slab of a known substance deposited over the structure by tracking the angle at which the minimum of transmission can be measured at a single frequency. We compare three versions of the proposed geometry by numerical calculation of the transmission coefficient depending on both the incidence angle and analyte slab’s thickness. We select the most suitable structure for sensing.

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Modeling and experimental investigation of the plasma uniformity in CF4/O2 capacitively coupled plasmas, operating in single frequency and dual frequency regime

Journal of Vacuum Science & Technology A Vacuum Surfaces and Films ◽

10.1116/1.4906819 ◽

2015 ◽

Vol 33 (2) ◽

pp. 021310 ◽

Cited By ~ 2

Author(s):

Yu-Ru Zhang ◽

Stefan Tinck ◽

Peter De Schepper ◽

You-Nian Wang ◽

Annemie Bogaerts

Keyword(s):

Experimental Investigation ◽

Single Frequency ◽

Dual Frequency ◽

Capacitively Coupled ◽

Frequency Regime ◽

Coupled Plasmas

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Reflection Enhancement and Giant Lateral Shift in Defective Photonic Crystals with Graphene

Applied Sciences ◽

10.3390/app9102141 ◽

2019 ◽

Vol 9 (10) ◽

pp. 2141 ◽

Cited By ~ 10

Author(s):

Dong Zhao ◽

Fangmei Liu ◽

Peng Meng ◽

Jie Wen ◽

Siliu Xu ◽

...

Keyword(s):

Photonic Crystals ◽

Interband Transition ◽

Single Layer ◽

Defect Layer ◽

Lateral Shift ◽

Single Layer Graphene ◽

Intraband Transition ◽

Highly Sensitive ◽

Highly Sensitive Sensors ◽

Periodic Number

This study investigates the reflectance of the defective mode (DM) and the lateral shift of reflected beam in defective photonic crystals incorporated with single-layer graphene by the transfer matrix method (TMM). Graphene, treated as an equivalent dielectric with a thickness of 0.34 nm, was embedded in the center of a defect layer. The reflectance of the DM was greatly enhanced as the intraband transition of electrons was converted to an interband transition in graphene. The reflectance of the DM could be further enhanced by increasing the Bragg periodic number. Furthermore, a large lateral shift of the reflected beam could also be induced around the DM. This study may find great applications in highly sensitive sensors.

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Highly sensitive photoacoustic imaging of orthotopic brain tumor based on the amplified photoacoustic effect of single-layer MoS2 nanosheets

Nanomedicine Nanotechnology Biology and Medicine ◽

10.1016/j.nano.2017.11.165 ◽

2018 ◽

Vol 14 (5) ◽

pp. 1799

Author(s):

Jingqin Chen ◽

Chengbo Liu ◽

Liang Song ◽

Zonghai Sheng ◽

Hairong Zheng

Keyword(s):

Brain Tumor ◽

Photoacoustic Imaging ◽

Single Layer ◽

Mos2 Nanosheets ◽

Photoacoustic Effect ◽

Highly Sensitive

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A Highly Sensitive Hydrogen Peroxide Amperometric Biosensor Based on the Single-Layer Graphene-Enzyme Composite Film

ECS Meeting Abstracts ◽

10.1149/ma2009-01/32/1196 ◽

2009 ◽

Keyword(s):

Hydrogen Peroxide ◽

Composite Film ◽

Single Layer ◽

Amperometric Biosensor ◽

Single Layer Graphene ◽

Layer Graphene ◽

Highly Sensitive

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Peculiarities of Forming Single-Frequency Generation in a Monopulse YAG:Nd-Laser with Transverse Diode Pumping and Injection of Narrow-Band Radiation

Journal of Applied Spectroscopy ◽

10.1007/s10812-016-0268-3 ◽

2016 ◽

Vol 83 (2) ◽

pp. 194-197

Author(s):

M. V. Bogdanovich ◽

V. S. Kalinov ◽

O. E. Kostik ◽

K. I. Lantsov ◽

K. V. Lepchenkov ◽

...

Keyword(s):

Narrow Band ◽

Single Frequency ◽

Diode Pumping ◽

Frequency Generation

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Analysis of Stabbing Performance of UHMWPE Fabric at Different Angles

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.821-822.223 ◽

2013 ◽

Vol 821-822 ◽

pp. 223-227 ◽

Cited By ~ 1

Author(s):

Sha Sha Yang ◽

Zhao Qun Du

Keyword(s):

Cutting Forces ◽

Performance Test ◽

Mutual Influence ◽

Material Selection ◽

Incidence Angle ◽

Single Layer ◽

Raw Material ◽

Angle Of Incidence ◽

Raw Material Selection ◽

Modes Of Interaction

Flexible stab-resistant fabrics have been widely used in military and civilian fields; however, there are few researches about effects of incidence angle on stabbing performance of fabrics. Thereof, the stab-resistant mechanism of fabric is investigated from raw material selection, fabric preparation and quasi-static stab-resistant performance test. We analyzed and obtained the modes of interaction between knife and fabric and the mutual influence between the fabrics through different angles and the compound way at different angles. Results show that with the increasing of the angle of incidence, the cutting forces of fabric decrease and the strength reducing rate of fabric increases. The strength trend of compound fabric at different angles is the same as single layer fabric; however, the strength reducing rate firstly increases then decreases. It may be explained that there exists interaction between the fabrics in the cutting process.

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A Novel Planar Dipole Antenna with Distributed Inductive Load for Size Reduction

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.846-847.452 ◽

2013 ◽

Vol 846-847 ◽

pp. 452-456

Author(s):

Bing Gong ◽

Rui Li ◽

Shang Hong Zhao ◽

Lei Shi ◽

Huan Mei Zhang

Keyword(s):

Microstrip Line ◽

Narrow Band ◽

Single Layer ◽

Dipole Antenna ◽

Effective Length ◽

Inductive Load ◽

Ism Band ◽

Feed Line ◽

Antenna Performance ◽

Microstrip Feed

A technique is employed to reduce the size of planar dipole. The technique is consists of adding short-ended microstrip line at the top of the dipole, making the structure be inductive load, and as a result, increase the effective length. A design example for the ISM band is presented. The configuration reduces the resonance frequency of the planar dipole by 25.8% without degrading influence on antenna performance. The antenna comprising of only a single layer planar in additional to the microstrip feed line offers over a S11<-10dB bandwidth from 2.4GHz to 2.4835GHz which is wide enough to cover WLAN, BLUETOOTH, RFID, and WIFI communication bands. With this reduced size and omnidirectional pattern, it is very suitable for narrow band systems such as: WCDMA, WiMAX, among others.

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Highly Sensitive Flow Sensor Based on Flexible Dual-Layer Heating Structures

Sensors ◽

10.3390/s20226657 ◽

2020 ◽

Vol 20 (22) ◽

pp. 6657

Author(s):

Yu-Chao Yan ◽

Cheng-Yu Jiang ◽

Run-Bo Chen ◽

Bing-He Ma ◽

Jin-Jun Deng ◽

...

Keyword(s):

Heat Conduction ◽

Convection Heat Transfer ◽

Single Layer ◽

Flow Sensor ◽

Film Sensor ◽

Highly Sensitive ◽

Layer Heating ◽

Low Sensitivity ◽

Flow Detection ◽

Hot Film

Hot film sensors detect the flow shear stress based on the forced convection heat transfer to the fluid. Current hot film sensors have been significantly hindered by the relatively low sensitivity due to the massive heat conduction to the substrate. This paper describes the design, fabrication, simulation, and testing of a novel flow sensor with dual-layer hot film structures. More specifically, the heat conduction was insulated from the sensing heater to the substrate by controlling both sensing and guarding heaters working at the same temperature, resulting in a higher sensitivity. The experiment and simulation results showed that the sensitivity of the dual-layer hot film sensor was significantly improved in comparison to the single-layer sensor. Additionally, the dual-layer sensor was designed and fabricated in an integrated, flexible, and miniaturized manner. Its small size makes it an excellent candidate for flow detection.

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Comparison of Theoretical and Laboratory Out-of-Plane Shear Stiffness Values of Cross Laminated Timber Panels

Buildings ◽

10.3390/buildings8100146 ◽

2018 ◽

Vol 8 (10) ◽

pp. 146 ◽

Cited By ~ 3

Author(s):

Jan Niederwestberg ◽

Jianhui Zhou ◽

Ying-Hei Chui

Keyword(s):

Shear Modulus ◽

Cross Section ◽

Single Layer ◽

Beam Theory ◽

Shear Stiffness ◽

Plane Shear ◽

Shear Moduli ◽

Cross Laminated Timber ◽

Highly Sensitive ◽

Out Of Plane

The lay-up of cross laminated timber (CLT) leads to significant differences in properties over its cross-section. Particularly the out-of-plane shear behavior of CLT is affected by the changes in shear moduli over the cross-section. Results from laboratory shear tests are used to evaluate the shear stiffness of 3- and 5-layer CLT panels in their major and minor strength direction. The results are compared to calculated shear stiffness values on evaluated single-layer properties as well as commonly used property ratios using the Timoshenko beam theory and the shear analogy method. Differences between the two calculation approaches are pointed out. The shear stiffness is highly sensitive to the ratio of the shear modulus parallel to the grain to the shear modulus perpendicular to the grain. The stiffness values determined from two test measurements are compared with the calculated results. The level of agreement is dependent on the number of layers in CLT and the property axis of the CLT panels.

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