Displacement sensor based on plasmonic slot metamaterials

Wu, Wei; Ren, Mengxin; Pi, Biao; Cai, Wei; Xu, Jingyi

doi:10.1063/1.4940909

Cited by 17 publications

(14 citation statements)

References 23 publications

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“…Recently, the enormous successes of metamaterials in imaging 12 , miniaturization of the antenna 13 and stealth 14 have attracted great attention for sensing applications in displacement 15 , thin-film thickness 16 , strain 17 , 18 , inductive–capacitive detection 19 and substance analysis such as protein 20 , biomolecules 21 and liquid chemical 22 . Considering that microfluidic technology is widely used in the microscopic field, such as chemical reactions 23 , microanalysis 24 and single-cell analysis 25 , one promising approach to develop a label-free and non-destructive chemical measurement technique is to combine microfluidic technology with metamaterials.…”

Section: Introductionmentioning

confidence: 99%

Multi-Band Sensing for Dielectric Property of Chemicals Using Metamaterial Integrated Microfluidic Sensor

Zhou

Yang

et al. 2018

Sci Rep

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The growth of the chemical industry has brought tremendous challenges to chemical sensing technology. Chemical sensors based on metamaterials have great potential because of their label-free and non-destructive characteristics. However, metamaterials applied in chemical sensing have mainly been investigated from the measurement of sample concentration or the determination of the dielectric properties at a fixed frequency. Here we present a metamaterial integrated microfluidic (MIM) sensor for the multi-band sensing for dielectric property of chemicals, which is promising for the identification of chemicals. The MIM sensor mainly consists of multiple pair of high sensitive symmetrical double split-ring resonators (DSRRs) and meandering microfluidic channels with a capacity of only 4 μL. A dielectric model has been innovatively established and experimentally verified to accurately estimate the complex permittivity and thus realize the multi-band sensing of dielectric property of chemicals. With the increase in the number of resonators in the sensor, a dielectric spectrum like curve could be obtained for more detailed dielectric information. This work delivers a miniaturized, reusable, label-free and non-destructive metamaterial-microfluidic solution and paves a way of the multi-band sensing for dielectric property of chemicals.

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Section: Introductionmentioning

confidence: 99%

Multi-Band Sensing for Dielectric Property of Chemicals Using Metamaterial Integrated Microfluidic Sensor

Zhou

Yang

et al. 2018

Sci Rep

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“…As the counterpart of the strain-actuated metamaterials, the metamaterials on stretchable substrates can sense the external force or displacement by observing the resonance frequency shift [143][144][145][146][147][148][149][150]. An asymmetrical strip dipole antenna in Figure 11D is encapsulated in the PDMS layers to locate and record the region of stress and fatigue [45].…”

Section: Plasmonically Enhanced Physical Sensormentioning

confidence: 99%

Metamaterials – from fundamentals and MEMS tuning mechanisms to applications

2020

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Metamaterials, consisting of subwavelength resonant structures, can be artificially engineered to yield desired response to electromagnetic waves. In contrast to the naturally existing materials whose properties are limited by their chemical compositions and structures, the optical response of metamaterials is controlled by the geometrics of resonant unit cells, called “meta-atoms”. Many exotic functionalities such as negative refractive index, cloaking, perfect absorber, have been realized in metamaterials. One recent technical advance in this field is the active metamaterial, in which the structure of metamaterials can be tuned to realize multiple states in a single device. Microelectromechanical systems (MEMS) technology, well-known for its ability of reconfiguring mechanical structures, complementary metal-oxide-semiconductor (CMOS) compatibility and low power consumption, is perfectly suitable for such purpose. In the past one decade, we have seen numerous exciting works endeavoring to incorporate the novel MEMS functionalities with metamaterials for widespread applications. In this review, we will first visit the fundamental theories of MEMS-based active metamaterials, such as the lumped circuit model, coupled-mode theory, and interference theory. Then, we summarize the recent applications of MEMS-based metamaterials in various research fields. Finally, we provide an outlook on the future research directions of MEMS-based metamaterials and their possible applications.

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“…[6][7][8][9] Due to near unity absorption in the ultrathin absorbing layer, perfect absorber metamaterials gained prominence, and are demonstrated for light absorption, spatial and spectral modulation of light, thermal emission, and detection as well as refractive index sensing of gases and liquids. [10][11][12][13][14][15][16][17][18][19][20] Perfect absorbers are either broadband or narrowband depending on their absorption bandwidth. [21,22] While broadband perfect absorbers are studied to improve solar energy harvesting, perfect narrowband absorbers are demonstrated for optical sensing, modulation, and thermal emission tailoring applications.…”

Section: Introductionmentioning

confidence: 99%

Reusable Biosensor Based on Differential Phase Detection at the Point of Darkness

Samdani

Kala

Kaurav

et al. 2021

Advanced Photonics Research

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A differential phase sensor based on a narrowband perfect absorber uses the phase singularity at the point of darkness (100% absorption). Herein, a structure with a top SiO2 layer is proposed that is index matched with a glass flow cell that shows the point of darkness for both s‐ and p‐polarizations. Detailed numerical results to optimize the structure, study the role of fluctuation in thickness and roughness of analyte layer show that the proposed structure has refractive index sensitivity of 147.3° RIU−1. Experimental results of launch angle independent ≈99.9% absorption in the 45°–73° range are reported, with the highest reported till date quality factor in planar narrowband absorbers of ≈42, and high figure of merit of 556 for p‐polarization. The structure also exhibits the generalized Brewster effect with a perfect absorption (≈99.99%) for s‐polarization at ≈74° angle. Experimental results are presented to demonstrate the sensor operation for two different biomolecules at the p‐polarization resonance. The configuration presented is ideal for reusable and cost‐effective biosensors.

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Displacement sensor based on plasmonic slot metamaterials

Cited by 17 publications

References 23 publications

Multi-Band Sensing for Dielectric Property of Chemicals Using Metamaterial Integrated Microfluidic Sensor

Multi-Band Sensing for Dielectric Property of Chemicals Using Metamaterial Integrated Microfluidic Sensor

Metamaterials – from fundamentals and MEMS tuning mechanisms to applications

Reusable Biosensor Based on Differential Phase Detection at the Point of Darkness

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