Abstract We present a comprehensive study of magnetic sensor system that benefits from new technique to substantially increase the magnetoelastic coupling surface acoustic waves (SAW). The device uses shear horizontal are guided by fused silica layer with an amorphous magnetostrictive FeCoSiB thin film on top. velocity these so-called Love follows magnetoelastically-induced changes modulus according field present. SAW is operated in delay line configuration at approximately 150 MHz and...

Magnetoelectric (ME) thin film cantilever type sensors made of AlN and FeCoSiB are operated in vacuum, reducing air damping thus increasing the ME coefficient improving limit detection (LOD) for ac-magnetic fields. Depending on sensor geometry, response is increased by a factor 5 resulting 20 kV/cmOe at 152 Hz 11 with 12 4.7 kHz an improvement LOD order magnitude. Modelling these cantilevers reveals dominant contributions viscoelastic molecular above intrinsic below 10−2 mbar, respectively.

Highly sensitive AC magnetic field sensors are presented using magnetoelectric composites consisting of magnetostrictive and piezoelectric phases. They offering passive nature, high sensitivity, large effect enhancement at mechanical resonance, linear dynamic range. Thin‐film 2‐2 benefit from perfect coupling between the phases reduction in size which is essential for spatial resolution. Their design uses AlN a plate capacitor or PZT with interdigital electrodes amorphous FeCoSiB single...

We present a handheld biosensor system for the label-free and specific multiplexed detection of several biomarkers employing spectrometer-free imaging measurement system.A photonic crystal surface functionalized with multiple ligands forms optical transducer.The slab is fabricated on glass substrate by replicating periodic grating master stamp period 370 nm into photoresist via nanoimprint lithography deposition 70-nm titanium dioxide layer.Capture molecules are coupled covalently drop-wise...

Magnetomyography (MMG) with superconducting quantum interference devices (SQUIDs) enabled the measurement of very weak magnetic fields (femto to pico Tesla) generated from human skeletal muscles during contraction. However, SQUIDs are bulky, costly, and require working in a temperature-controlled environment, limiting wide-spread clinical use. We introduce low-profile magnetoelectric (ME) sensor analog frontend circuitry that has sensitivity measure pico-Tesla MMG signals at room...

There is a strong need for low-cost biosensors to enable rapid, on-site analysis of biological, biomedical, or chemical substances. We propose platform label-free optical based on applying the analyte onto surface-functionalized photonic crystal slab and performing transmission measurement with two crossed polarization filters. This dark-field approach allows efficient background suppression as only guided-mode resonances interacting functionalized surface experience significant rotation....

Magnetoelectric (ME) thin film composites on silicon cantilevers are fabricated using Pb(Zr0.52Ti0.45)O3 (PZT) films with interdigital transducer electrodes the top side and FeCoSiB amorphous magnetostrictive backside. These without any direct interface between piezoelectric phase superior to conventional plate capacitor-type ME composites. A limit of detection 2.6 pT/Hz1/2 at mechanical resonance is determined which corresponds an improvement a factor approximately 2.8 compared best type...

We demonstrate a pressure sensor based on deformation of periodically nanostructured Bragg grating waveguide flexible 50 µm polydimethylsiloxane membrane and remote optical read out. A change causes this 2 mm diameter photonic crystal sealing reference volume. The resulting shift the guided mode resonances is observed by camera as localized color change. Crossed polarization filters are employed for enhancing visibility resonances. Pressure values calculated from intensity in green channel...

In precision agriculture, information technology is used to improve farm management practices. Thereby, productivity can be increased and challenges with overfertilization water consumption addressed. This requires low-power wireless underground sensor nodes for monitoring the physical, chemical biological soil parameters at position of plant roots. Three ESP32-based these capabilities have been designed measure moisture temperature. A system has developed collect measurement data from a...

<title>Abstract</title> Resonant excitation of nanooptical templates offers great advantages for localized photocatalytic activity. We present a design, fabrication and characterization nanostructured TiO₂ to mimic the dynamic behavior growth long-range axonal connections in neuromorphic computing architectures. use activity reduce gold particles from precursor solution influence with light-dependent field enhancements inside TiO₂. Nanooptical different grating...

The development of magnetic field sensors with high sensitivity is crucial for accurate detection fields. In this context, we present a theoretical model highly sensitive surface acoustic wave (SAW) sensor that utilizes phononic crystal (PnC) structures composed Au pillars embedded within SiO2 guiding layer. We study rectangular and triangular PnCs assess their potential application in thin-film sensors. our design, the PnC integrated into layer, preserving continuous magnetostrictive layer...

We demonstrate how to design thin-film multilayer structures that separate multiple wavelength channels with a single stack by spatial dispersion, thus allowing compact manufacturable multiplexers and demultiplexers possibly beam-steering or dispersion-control devices. discuss four types of structure--periodic one-dimensional photonic crystal superprism structures, double-chirped exploiting wavelength-dependent penetration depth, coupled-cavity dispersion is due stored energy, numerically...

We describe a cost-efficient and large area scalable production process of organic light-emitting diodes (OLEDs) with photonic crystals (PCs) as extraction elements for guided modes. Using laser interference lithography physical plasma etching, we texture the indium tin oxide (ITO) electrode layer an OLED one- two-dimensional PC gratings. By optical transmission measurements, resonant mode grating is shown to have drift only 0.4% over 5mm length ITO grating. changing lattice constant between...

Nanocomposite organic/inorganic com­pounds are used to fabricate thick, conductive and highly transparent layers, which as hole injection transport layers in OLEDs. The composite consist of SiO2-nanoparticles the polymer PEDOT:PSS. filling fraction PEDOT:PSS these thick is reduced 3.9%. OLEDs comprising such show an increased outcoupling efficiency.

The authors report the dynamic properties of bulk heterojunction photodiodes based on a polymer blend system consisting poly(3-hexylthiophene-2,5-diyl) and fullerene derivative [6,6]-phenyl C61-butyric acid methyl ester. Devices with high-frequency contact layout were analyzed under continuous wave pulsed laser illumination (λ=532nm). organic exhibit pulse response full width at half maximum 11ns to applied 1.6-ns-long pulses. Rise times as small 1.6ns fall &amp;lt;40ns measured reverse bias.

Resonant waveguide gratings (RWG) − also called photonic crystal slabs (PCS) have been established as reliable optical transducers for label-free biochemical assays well cell-based assays. Current readout systems are based on mechanical scanning and spectrometric measurements with system sizes suitable laboratory equipment. Here, we review recent progress in compact intensity-based point-of-care (POC) applications. We briefly introduce PCSs sensitive different approaches systems. Photometric...

The application of nanopatterned electrode materials is a promising method to improve the performance thin-film optoelectronic devices such as organic light-emitting diodes (OLEDs) and photovoltaics. Light coupling active layers enhanced by employing nanopatterns specifically tailored device structure. A range different typically evaluated during development process. Fabrication each these using electron-beam lithography time- cost-intensive, particularly for larger-scale devices, due serial...

Using the optical transduction properties of one-dimensional photonic crystal slabs is a promising approach for label-free biosensing in field flexible and wearable biosensing. In this work we demonstrate fabrication (f-PCS) via an exfoliation method from rigid slabs. We investigate processing effect on show that resonances are maintained, but affected. The quality factor changes 50 to 31 TE mode 187 136 TM after process. use f-PCS refractive index sensing achieve limit detection (LOD) 3.6...

Titanium dioxide is well-known for its excellent photocatalytic properties. UV-controlled photodeposition of gold on TiO

We demonstrate the use of a 30-period dielectric stack structure as highly dispersive device to spatially separate two beams with 4-nm wavelength difference by more than their beam width. Unlike previous devices, our is simple fabricate and relatively compact. discuss possible applications within wavelength-division multiplexing systems.

The wavelength of the 57Fe Mössbauer radiation is measured with a relative uncertainty 0.19 ppm by using almost exact Bragg backscattering from reference silicon crystal. Its value determined as lambda(M) = 0.860 254 74(16)x10(-10) m. corresponding photon energy E(M) 14 412.497(3) eV. easily reproducible an accuracy at least 10(-11)lambda(M) and could be used length standard atomic dimensions.

We demonstrate that a single 66-layer nonperiodic thin-film stack can be used to separate four wavelength channels by spatial beam shifting. This device uses group velocity effects similar the superprism effect observed in photonic crystals, but shows larger and more controlled shifts including constant dispersion allowing for equidistant channel spacing. Experimentally, nearly linear 100-μm shift is achieved between 827 841 nm. System considerations are discussed.

We fabricated organic light-emitting diodes with one-dimensional Bragg gratings as light extraction elements for substrate and waveguide modes. A Ta2O5 layer was introduced to obtain a high refractive index contrast the subsequent anode layer. As we employed highly conductive polymer. Laser interference lithography physical plasma etching were used pattern into lattice constant of 370 nm various grating depths. Mainly attributed outcoupling modes, structured devices exhibit luminous flux...

This paper investigates the suitability of two-dimensional (2D) finite-element method (FEM) simulations to model quasi-static bending-mode response cantilever magnetoelectric (ME) sensors. We compute deformation due an applied magnetic field across magnetostrictive (MS) layer as well generated voltage piezoelectric (PE) by solving a system coupled linear elastostatic/elastodynamic and electrostatic/magnetostatic equations. In 2D FEM formulation plane-stress boundary condition is employed....