On the performance of an ENZ-based sensor using transmission line theory and effective medium approach

Pacheco‐Peña, Víctor; Beruete, Miguel; Rodríguez-Ulibarri, Pablo; Engheta, Nader

doi:10.1088/1367-2630/ab116f

Cited by 69 publications

(59 citation statements)

References 50 publications

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“…They have been studied and demonstrated in different wave mechanisms and spectral bands ranging from acoustics, microwave and millimetre waves, terahertz waves and optics [15][16][17][18][19] . The freedom offered by metamaterials and metasurfaces, along with their compact designs, has opened up new avenues to improve the performance of devices and to develop new technologies, such as mathematical operators 20 , antennas and lenses [21][22][23][24] , sensors [25][26][27] and polarisation converters [28][29][30] .…”

Section: Introductionmentioning

confidence: 99%

Temporal aiming

2020

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Deflecting and changing the direction of propagation of electromagnetic waves are needed in multiple applications, such as in lens-antenna systems, point-to-point communications and radars. In this realm, metamaterials have been demonstrated to be great candidates for controlling wave propagation and wave-matter interactions by offering manipulation of their electromagnetic properties at will. They have been studied mainly in the frequency domain, but their temporal manipulation has become a topic of great interest during the past few years in the design of spatiotemporally modulated artificial media. In this work, we propose an idea for changing the direction of the energy propagation of electromagnetic waves by using time-dependent metamaterials, the permittivity of which is rapidly changed from isotropic to anisotropic values, an approach that we call temporal aiming. In so doing, here, we show how the direction of the Poynting vector becomes different from that of the wavenumber. Several scenarios are analytically and numerically evaluated, such as plane waves under oblique incidence and Gaussian beams, demonstrating how proper engineering of the isotropic-anisotropic temporal function of ε r (t) can lead to a redirection of waves to different spatial locations in real time.

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Section: Introductionmentioning

confidence: 99%

Temporal aiming

2020

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“…Among the modified sensors, some of the electrochemical, colorimetric and chemiresistive devices were low-cost and can be used as disposable sensors. In recent years, impressive technological advances in different fields of physics and engineering: (I) have provided new low-cost sensing platforms based on e.g., metamaterials [ 114 , 115 ] and (II) have improved the pre-existing disposable sensors like microfluidic paper-based analytical device and screen printed electrodes. We believe that the modification of such new low-cost sensing platforms with imprinted polymer nanoparticles or thin layers, using new synthesis strategies, offer a great potential to develop new selective disposable sensors for sensitive detection of EPA Priority Pollutants and also other important target chemicals and biomolecules.…”

Section: Conclusion and Future Perspectivesmentioning

confidence: 99%

Molecularly Imprinted Polymer-Based Sensors for Priority Pollutants

Zarejousheghani

Rahimi

Borsdorf

et al. 2021

Sensors

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Globally, there is growing concern about the health risks of water and air pollution. The U.S. Environmental Protection Agency (EPA) has developed a list of priority pollutants containing 129 different chemical compounds. All of these chemicals are of significant interest due to their serious health and safety issues. Permanent exposure to some concentrations of these chemicals can cause severe and irrecoverable health effects, which can be easily prevented by their early identification. Molecularly imprinted polymers (MIPs) offer great potential for selective adsorption of chemicals from water and air samples. These selective artificial bio(mimetic) receptors are promising candidates for modification of sensors, especially disposable sensors, due to their low-cost, long-term stability, ease of engineering, simplicity of production and their applicability for a wide range of targets. Herein, innovative strategies used to develop MIP-based sensors for EPA priority pollutants will be reviewed.

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“…As it is known, for instance, the required phase of the pulses can be manipulated at will by changing the length of the transmission lines and/or by using different materials filling the transmission lines. [26,36] Our logic switching platform provides a fundamental pathway for elementary decision-making computations based on TEM signal interactions at cross points of simple transmission lines (such as parallel plate waveguides). With nosemiconductor technologies involved, here the decisions and/ or switching of data are carried out without relying on charge/ discharge-based elements, an important feature for high-speed computing applications.…”

Section: (6 Of 7)mentioning

confidence: 99%

Enabling High‐Speed Computing with Electromagnetic Pulse Switching

Yakovlev

Pacheco‐Peña

2020

Adv Materials Technologies

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involving tens if not hundreds of billions of transistors. This tremendous scaling of semiconductor devices is still predicted to continue for at least one more decade. [2] However, many obstacles begin to arise including challenges associated with physical effects, such as energy dissipation and spatial interconnectivity [3,4] which are largely caused by the principal foundations of the technology relying on transistors and/ or logic gates. Indeed, transistors are elementary switching devices that control the flow of electrical currents under the effect of voltages applied to their gates. However, these gates, together with some dielectric under them, form parasitic capacitances that get charged/discharged during the dynamic switching involved in computations. Such operations take time and consume energy from the available sources that are usually limited (i.e., batteries), creating boundaries and constraints both in the speed and efficiency of the available computing systems. [3] In this work we liberate ourselves from relying fully on charge-based devices in performing switching operations and look for alternative ways of unleashing the potential of electromagnetic (EM) waves for high-speed computing. EM waves already contribute to communications in computer systems but all the required switching is done using MOS-FET or semiconductor-based circuits. [5] Hence one may ask, is there a way of bridging this gap between EM waves and computing systems? to answer this question, outstanding efforts have been developed in the field of photonics and plasmonics for optical quantum computing [6,7] as well as beam splitting, matrix inversion, resonant plasmonic flow networks, [8-11] and 1D lattices using solitons [12,13] (representing an interesting example of a collision-based computing approach). Artificial electromagnetic media (metamaterials and metasurfaces as their 2D version) have also demonstrated to be great candidates for improved and new applications by controlling the EM response of media both in space and time. [14-19] Recently, they have been proposed to solve mathematical operations such as integrals, convolutions, and derivatives [20-23] as analogue computing devices. At their current research stage, such structures are potentially high-cost to implement and have mainly been proposed to solve a fixed computational operation, which could limit their future development for general-purpose computing systems. In our computing approach, however, we are not focused on performing arithmetic operations on data (as these can be performed by means of the technology at hand). Our technique relies on achieving an arbitrary control of the propagation of square EM Communication and transfer of information from one block to another within a system is fundamental for high-speed and efficient computing. Herein, a simple approach for computing, without using conventional electrical charge/ discharge-based primitive operations, in which information is represented in electromagnetic energy steps travelling in sections of tran...

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On the performance of an ENZ-based sensor using transmission line theory and effective medium approach

Cited by 69 publications

References 50 publications

Temporal aiming

Temporal aiming

Molecularly Imprinted Polymer-Based Sensors for Priority Pollutants

Enabling High‐Speed Computing with Electromagnetic Pulse Switching

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