Results 31 to 40 of about 27,154 (242)
A Single Waveguide Spectrometer via Defect Scattering
IEEE Photonics JournalMiniaturized spectrometers show great application potential in biology, medicine, astronomy and so on. However, it is still challenging to obtain broadband spectrum and high spectral resolution simultaneously with limited size. In this study, we proposed
Xue Tong +6 more
doaj +1 more source
Spectrally Tunable 2D Material‐Based Infrared Photodetectors for Intelligent Optoelectronics
Advanced Functional Materials, EarlyView.Intelligent optoelectronics through spectral engineering of 2D material‐based infrared photodetectors. Abstract The evolution of intelligent optoelectronic systems is driven by artificial intelligence (AI). However, their practical realization hinges on the ability to dynamically capture and process optical signals across a broad infrared (IR) spectrum.
Junheon Ha +18 more
wiley +1 more source
Microwave Components Realized by Additive Manufacturing Techniques [PDF]
Radioengineering, 2020 This paper presents an overview of the use of additive manufacturing (AM) technologies for the implementation of microwave components. Two major technological solutions, based on the AM of plastic materials, are discussed: in the former case, the AM ...
C. Tomassoni, M. Bozzi
doaj
New Journal of Physics, 2023 Abstract We provide a theoretical framework to mold time-modulated mechanical metamaterials with frequency conversion and wave-steering capabilities. To illustrate the concept, we initially focus on 1D lattices, whereby a sufficiently slow time-modulation of the stiffness is employed to convert the frequency content of impinging waves ...
Jonatha Santini, Emanuele Riva
openaire +4 more sources
Advanced Functional Materials, EarlyView.A spatiotemporal plasma–mediated laser processing approach is developed to fabricate ultrahigh–aspect ratio nanochannel arrays and corresponding perovskite nanowire arrays within transparent materials for optoelectronics devices. The laser‐fabricated nanochannels serve as templates for controlled perovskite infiltration and crystallization, enabling ...
Taijin Wang +3 more
wiley +1 more source
Block Copolymers: Emerging Building Blocks for Additive Manufacturing
Advanced Functional Materials, EarlyView.This review addresses how block copolymer (BCP) physics and rheology have led to the widespread use of BCPs in advanced additive manufacturing techniques, with particular emphasis on the untapped potential of these nanostructured materials toward achieving multi‐scale architected materials with unique, programmable material properties.
Alice S. Fergerson +3 more
wiley +1 more source
Method of calculating the parameters of ultrasonic super-high-frequency transducers
Технологія та конструювання в електронній апаратурі, 2013 The paper presents a method of calculating the parameters of half-wave package ultrasonic piezoelectric emitters and step waveguides, which has an error no more than 6—8%.
V. L. Lanin, I. B. Petukhov
doaj
Second-Harmonic Generation in Suspended AlGaAs Waveguides: A Comparative Study
Micromachines, 2020 Due to adjustable modal birefringence, suspended AlGaAs optical waveguides with submicron transverse sections can support phase-matched frequency mixing in the whole material transparency range, even close to the material bandgap, by tuning the width-to ...
Iännis Roland +6 more
doaj +1 more source
Advanced Functional Materials, EarlyView.Pullulan, a biomass‐derived polysaccharide, is transformed into transparent optical fibers using a solvent‐free borax hydrogel‐spinning method. The fibers outperform PMMA with ≈200 MPa tensile strength and 200 °C stability, while uniquely guiding visible‐to‐NIR light and enabling additive‐free humidity sensing.
Yuya Fukata +4 more
wiley +1 more source
Compact
IEEE AccessThis paper presents a compact Ku-band monopulse comparator with enhanced inter-port balance and isolation. The key component, a magic-T, was designed using an offset two-step rectangular prism and an iris to improve impedance matching and isolation while
Jongmin Lee +4 more
doaj +1 more source