Results 201 to 210 of about 2,724,356 (341)
Fiber Bragg Gratings with Micro‐Engineered Temperature Coefficients
Advanced Optical Materials, Volume 13, Issue 8, March 13, 2025.Fiber Bragg gratings (FBGs) are intrinsically responsive to temperature and strain simultaneously. In this research, low‐loss FBGs with micro‐engineered temperature coefficients are fabricated, utilizing refractive index liquid‐filled microchannels in the cladding.
Zipei Song +8 more
wiley +1 more source
The Anomaly Mixed Spectrum Signals Detection Based on ICA and KNN
, 2016 Jin Lü, Ming Huang, Jingjing Yang
openalex +2 more sources
Dynamic Excitonic Beam Switching with Atomically‐Thin Binary Blazed Gratings
Advanced Optical Materials, EarlyView.Two mirrored and interleaved blazed gratings are patterned into a monolayer WS2, contacted with gold electrodes inside an electrochemical cell. Applying a gate voltage to one of the grating electrode suppresses the exciton in that grating, enabling selective beam switching between diffractive orders.
Ludovica Guarneri +8 more
wiley +1 more source
Advanced Optical Materials, EarlyView.Picosecond spin current pulses generated by ferrimagnetic GdCo are studied via THz emission spectroscopy. Due to the GdCo micromagnetic structure, the spin current vanishes at compensation when a magnetic field is applied but persists for zero field. At room temperature, the THz spin current is dominated by Co. At low temperatures, Gd can significantly
Guillermo Nava Antonio +10 more
wiley +1 more source
Enhanced Two‐Photon Excited Emission of Quantum Emitters by Colloidal Plasmonic Metasurfaces
Advanced Photonics Research, EarlyView.Colloidal plasmonic metasurfaces presenting a completely exposed optical cavity are fabricated via templated self‐assembling silver nanoparticles into squared arrays on top of a thin film of CdSe/ZnS quantum dots. The resulting structure promotes the enhancement of the two‐photon absorption and emission processes of the quantum emitter by exploiting ...
Ylli Conti +4 more
wiley +1 more source
Machine Learning‐Driven Multi‐Objective Optimization of Microchannel Reactors for CO₂ Conversion
Advanced Sustainable Systems, EarlyView.This study introduces a novel method that combines CFD, RSM, and ML to improve a microreactor's performance utilizing the Sabatier reaction. A range of ML models is assessed, and the best one is selected to predict optimal reactor conditions. ML shows the ability to predict performance in just milliseconds, leading to a decrease in computational time ...
Sandeep Kumar +2 more
wiley +1 more source
Quenchable Amorphous Diamond: A Novel High‐Pressure Route to Tetrahedral Amorphous Carbon
Advanced Theory and Simulations, EarlyView.This study predicts the high‐pressure transformation of amorphous graphite into an sp3‐rich amorphous diamond phase using ab initio molecular dynamics. A first‐order transition is expected to occur ≈33 GPa in experiments, offering a novel synthesis route for sp3‐bonded amorphous carbon.
Murat Durandurdu
wiley +1 more source
Lightweight 3D Hierarchical Metamaterial Microlattices
Advanced Science, EarlyView.In this work, hierarchical lightweight 3D auxetic metamaterials based on cubic crystal lattice truss geometries are proposed. Microscale prototypes are fabricated using two‐photon lithography additive manufacturing and tested in situ. These hierarchical metamaterials are shown to exhibit a wide range of negative Poisson's ratios including giant ...
Luke Mizzi +5 more
wiley +1 more source
State of the Art of Low‐Frequency Acoustic Modulation: Intensity Enhancement and Directional Control
Advanced Science, EarlyView.High intensity low‐frequency sound sources hold significant value in many fields. However, their long wavelength, strong penetrability, and tendency to diffract make direction control and intensity enhancement challenging. Acoustic generators and metamaterial‐based acoustic devices still face issues such as low energy efficiency, poor directional ...
Jingsong Xu +13 more
wiley +1 more source