A5035754878- Acoustic Wave Resonator Technologies
- Photonic Crystal and Fiber Optics
- Phase-change materials and chalcogenides
- Multiferroics and related materials
- Advanced Fiber Optic Sensors
- Magnetic Field Sensors Techniques
- Ferroelectric and Piezoelectric Materials
- Optical Network Technologies
- Magnetic and transport properties of perovskites and related materials
- Nonlinear Optical Materials Studies
- Glass properties and applications
- Metal and Thin Film Mechanics
- ZnO doping and properties
- Photonic and Optical Devices
- Optical Coherence Tomography Applications
- GaN-based semiconductor devices and materials
- Non-Destructive Testing Techniques
- Magneto-Optical Properties and Applications
- Spectroscopy Techniques in Biomedical and Chemical Research
- Advanced Fiber Laser Technologies
Fraunhofer Institute for Silicon Technology
2019-2022
Ningbo University
2018-2021
National Engineering Research Center of Electromagnetic Radiation Control Materials
2019-2021
MEMS sensors based on magnetoelectric composites have attracted great interest due to their capability detect weak magnetic fields, showing high potential in applications like biomagnetic field detection and particle imaging. This paper reports a scandium aluminum nitride thin film-based sensor. The sensor consists of polycrystalline silicon cantilever with size 1000 μm × 200 covered by piezoelectric Al0.73Sc0.27N magnetostrictive (Fe90Co10)78Si12B10 film. performance the presented is...
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...
We demonstrated an ultrabroadband supercontinuum (SC) generation with high coherence property in all-normal-dispersion (ANDi) Te-based chalcogenide tapered fiber. The fibers made of Ge20As20Se15Te45 core and Ge20As20Se20Te40 cladding glasses were fabricated via isolated stacked extrusion. waist diameter length can be accurately controlled by a homemade tapering platform. When the was ≤14 μm, fiber showed ANDi characteristic wavelength range 1.7-14 μm. A coherent SC covered 1.7-12.7 μm...
In this work, we present a method for growing highly c-axis oriented aluminum scandium nitride (AlScN) thin films on (100) silicon (Si), dioxide (SiO2) and epitaxial polysilicon (poly-Si) substrates using substrate independent approach. The presented offers great advantages in applications such as piezoelectric thin-film-based surface acoustic wave devices where metallic seed layer cannot be used. approach relies AlN to establish wurtzite nucleation the growth of w-AlScN films. Both AlScN...
Magnetoelectric thin-film sensors based on the delta-E effect have widely been reported for detection of low frequency and small amplitude magnetic fields. Such are usually fabricated with microelectromechanical system technology, where aluminum nitride (AlN) is established piezoelectric material. Here, we present scandium (AlScN) instead compare it AlN using two identical design. The experimentally theoretically analyzed regarding sensitivity, noise, limit (LOD), resonator linearity. We...
A geometrical optimization study of Ge-Sb-Se chalcogenide glass tapered fiber sensors for concentration sensing methanol is presented. The effects the parameters such as taper waist diameter and transition region lengths on evanescent wave penetration depth are discussed based ray-tracing theory. Numerical analysis results demonstrate that performance sensor can be enhanced by decreasing length down-taper combined with increasing up-taper. homemade tapering platform enables controlling...
In this work, the first surface acoustic-wave-based magnetic field sensor using thin-film AlScN as piezoelectric material deposited on a silicon substrate is presented. The fabrication based standard semiconductor technology. acoustically active area consists of an layer that can be excited with interdigital transducers, smoothing SiO2 layer, and magnetostrictive FeCoSiB film. detection limit 2.4 nT/Hz at 10 Hz 72 pT/Hz kHz input power 20 dBm. dynamic range was found to span from about ±1.7...
Abstract This paper reports on frequency tunable MEMS magnetoelectric (ME) sensors. Different designs are studied in respect to ME voltage coefficient and tunability. Compared state-of-the-art sensors, the presented resonators display a highly reversible linear tuning, enabled by applying DC piezoelectric actuators. A shift of up 0.2 Hz V −1 is demonstrated for sensor with limit detection 128 pT/Hz 0.5 at resonance 13 kHz. type particular interest vector field sensors arrays bio-magnetic...
Low-loss optical fibers of Ge15As25Se40Te20 glass purified by combined chemical and physical methods were successfully drawn. A novel fabrication method fiber preform was adopted wrapping a 1 mm thick polyethersulfone (PES) plastic tube around the rod. The optical, thermal, bending strength properties comprehensively investigated. minimum transmission loss measured as 0.6 dB/m at 6.05 µm, average approximately 180.67 MPa with Weibull slope 49.18 for 400 µm diameter. Optical power...
A novel Ge-As-Se-Te chalcogenide glass (ChG)-tapered fiber (ChG-TF) sensor for detecting environmentally relevant organic pollutants with p-xylene as the model was investigated. The prominent design feature of is that its tapered zone coated a polydopamine membrane by facile in situ self-polymerization process. As exposed to aqueous sample, molecules would be enriched into coating. detection limit solution obtained polydopamine-coated decreased 50 µg/mL, which approximately 2.5% uncoated...
We reported the fabrication of a high-precision, long-length (>10 cm), four-hole, and As-free Ge15Sb15Se70 chalcogenide (ChG) suspended-core fiber (SCF) preform based on computerized numerical control (CNC) precision mechanical drilling method. Four holes were highly symmetrical have depth 103 mm. A with core diameter 7 µm, cladding 300 µm, regular air hole structure was drawn by using inflating methods through accurately controlling inflation pressure. Theoretical simulation zero-dispersion...
This letter uses a surface acoustic wave magnetic field sensor for measurement and closed-loop current control of the inductor in GaN-based dc-dc power converter.The is based on aluminium scandium nitride thin films with relatively high Sc concentration 32% fabricated low-cost 8-in silicon substrate, magnetostrictive FeCoSiB film top SAW delay line.The device has dc bidirectional capability (derived from flux density around trace) operated electrically isolated above trace.With permanent...