In this paper, we present a Fano metal-insulator-metal (MIM) structure based on an isosceles triangular cavity resonator for refractive index sensing applications. Due to the specific feeding scheme and asymmetry introduced in cavity, exhibits four sharp Fano-like resonances. The behavior of is analyzed detail its capabilities demonstrated through responses various indices. results show that sensor has very good sensitivity maximal figure merit (FOM) value 3.2 × 10⁵. comparison other similar...

Embedded eigenstates are nonradiative modes of an open structure with momentum compatible radiation, yet characterized by unboundedly large Q factors. Traditionally, these states originate from total destructive interference radiation two or more nonorthogonal in periodic structures. In this work, we demonstrate a class embedded based on Berreman epsilon-near-zero layered materials and propose realistic silicon carbide structures that support high-Q ($\ensuremath{-}{10}^{3}$) resonances...

Plant stress monitoring is of crucial importance to understand the plant response environmental conditions, and has been widely applied in various fields including biology, agronomy, botany, horticulture. A number methods instruments for have proposed, most which show significant disadvantages such as high cost, poor accuracy or complex operation that limit use devices. In this paper, we propose a low portable active multispectral optical device precise detection field mapping named...

In this paper, we present two novel dual-band bandpass filters based on surface plasmon polariton-like (SPP-like) propagation induced by structural dispersion of substrate integrated waveguide (SIW). Both are realized as a three-layer SIW where each layer represents sub-SIW structure with intrinsic effective permittivity that depends its width and filling dielectric material. The layers designed to have permittivities opposite signs in certain frequency ranges, which enables SPP-like occur...

Conventional approaches to the control of acoustic waves propagating along boundaries between fluids and hard grooved surfaces are limited manipulation surface geometry. Here we demonstrate for first time, through theoretical analysis, numerical simulation as well experimentally, that velocity waves, consequently direction their propagation shape wave fronts, can be controlled by varying temperature distribution over surface. This significantly increases versatility applications such sound...

Microwave sensors have attracted a considerable attention since they can provide non-invasive, label-free, and real-time detection; however, often suffer from low sensitivity resolution. In this paper, we present novel highly sensitive microwave sensor based on half-mode substrate integrated waveguide (HM SIW) that supports surface plasmon polariton (SPP)-like propagation. Two comprising guiding parts of HM SIW, one which contains the sensed analyte, exhibit real effective permittivities...

An ongoing research theme is identifying and exploiting similarities in exotic behaviors of light sound waves. The titular device the acoustic analogue a metal-insulator-metal plasmonic waveguide. This study experimentally analyzes validates properties proposed waveguide, terms its dispersion modal properties. Similar to supported symmetric antisymmetric modes group phase velocities, can be largely controlled by changes geometrical parameters, opening possibility applying this technology...

We present the concept and a proof-of-principle experiment for an acoustofluidic single- particle sorter. In microfluidic channel, flow profile with following three parallel fluid domains is generated: buffer in center plus particles lateral domains. Due to laminar regime microfluidics, essentially follow stream line(s) along channel. spatially confined sorting detection region, by switching on standing acoustic wave, of interest (POIs) are pushed into domain, thus leaving chip at outlet....

By using lateral extensional modes of piezoelectric plate transducers for the actuation a microfluidic chip containing structured microchannel, we achieved 2-D single-node acoustofluidic particle trapping inside circular cavity as well multinode in straight channels. In order to manipulate particles two dimensions, used separate PZT attached bottom chip, where each is responsible generating standing acoustic wave specific direction structures chip. We demonstrate polymer microspheres and...

Low temperature co-fired ceramics (LTCC) have shown to be one of the most admirable materials in high-frequency components design ([1], [2]). dielectric losses and applicability highly conductive are making them desirable production high quality passive components, often capacitors inductors. These reasons that made this technology attractive for circulator fabrication, present core paper. Bosma type with Y-junction configuration is topic work intended use at 5 GHz. Field analysis was...

This paper presents a low-temperature co-fired ceramic (LTCC) dual-band bandpass filter based on surface plasmon polariton (SPP) like propagation. The consists of three-layer substrate integrated waveguide (SIW), where the layers represent sub-SIW structures whose effective dielectric constants have opposite signs in different frequency ranges. In that manner, SPP-like propagation occurs at two frequencies, providing filtering operation. concept and design are explained detail, together with...

By establishing and exploring a numeric model of an acoustofluidic device driven by piezoelectric plate transducer, we discovered simple distinct vibrational patterns with high displacement amplitudes for lateral mode the transducer plate. With design based on numerically optimized chip-geometry this particular mode, fabricated high-performant chips enabling rapid accurate particle focusing, where acoustic energy density is exceeding 100 J/m <sup...

In this paper, the design procedure of a compact dual-band bandstop filter (DBBSF) based on coupled open-ended Hilbert lines is proposed. The proposed topology consists two pairs bended in shape fractal curves and stepped-impedance line section (SIS). that manner, tree transmission paths are crated allowing independent control characteristic both bands. To obtain appropriate coupling between resonators, center frequencies in-band characteristics filter, SIS introduced as matching section....

AbstractThis paper presents the theoretical analysis and experimental demonstration of mu-near-zero (MNZ) propagation in quasi-TEM microstrip circuits achieved by using metamaterials resonant type. We show that two frequencies exist which may support MNZ how actual operating frequency depends on properties host. The phenomena is then used to propose an entirely new class bandpass filters characterized significantly reduced variation group delay comparison conventional solutions.Keywords:...

The study demonstrates the possibility of achieving near-zero propagation sound waves in acoustic metamaterials based on a membrane-based metamaterial unit cell which exhibits effective mass density Lorentzian type. cell, represents counterpart split ring resonator, was previously used as building block left-handed metamaterials, it negative at certain frequencies. In this we show that its application can be extended to frequency where equals zero. This effect exploited range applications...

Acoustofluidic particle trapping in a circular resonant cavity microfluidic channel was performed using lateral mode of two equal piezoceramic plate transducers. In order to achieve two-dimensional focusing the cavity, transducers were mounted chip with <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">$90^{\circ}$</tex> tilt respect each other, so that transducer is responsible for generating standing wave either longitudinal or transversal...

On-chip infrared spectroscopy has become one of the indispensable key technologies for miniature biochemical sensors, gas food quality control, and environmental monitoring systems. The most important requirement on-chip spectroscopic sensors is to miniaturize functions be integrated into thermal emitters detectors. In this work, we propose a hybrid plasmon-photonic system consisting plasmonic grating coupled distributed Bragg reflector (DBR)-dielectric-metal cavity dual-band sensing...

Acoustofluidic particle manipulation in three orthogonal directions was performed simple and low-budget microfluidic chips that were laser-engraved laser-cut out of polymethylmethacrylate sheets. Besides the focusing separation particles to channel axis, which can be used so-called flow through separators, we also able accumulate at acoustic vibration nodes along axis lift them up vertical direction same experimental configuration. An application latter effect is demonstrated, by considering...

The recently emerged concepts of coherent perfect absorption (CPA), i.e., the time-reversed counterpart a laser and its generalization to Hermitian systems, virtual (CVA), are shown be ideally suited for all-optical light manipulation. In this work, we demonstrate how concept excitation can pave way scattering control in an extreme fashion non-Hermitian $\mathcal{PT}$ -symmetrical systems supporting embedded eigenstate. © 2019 Author(s)