Results 71 to 80 of about 24,010 (297)

Low‐Angle Grain Boundaries and Re‐Segregation in Single‐Crystalline Ni‐Base Superalloys

Advanced Engineering Materials, EarlyView.
This work demonstrates that Re‐segregation at low‐angle grain boundaries (LAGBs) in Ni‐base superalloys is influenced by misorientation angle. Advanced microscopy and atom probe tomography reveal that higher misorientation angles increases Re‐segregation.
Alireza B. Parsa, Aparna Saksena, Alesander Kostka, Pascal Thome, Felicitas Scholz, Alexandre Mussi, Christoph Somsen, Baptiste Gault, Jan Frenzel, Gunther Eggeler   +9 more
wiley   +1 more source

Reconfigurable fiber-to-waveguide coupling module enabled by phase-change material incorporated switchable directional couplers

Scientific Reports, 2022
In silicon photonics, grating-assisted fiber-to-waveguide couplers provide out-of-plane coupling to facilitate wafer-level testing; however, their limited bandwidth and efficiency restrict their use in broadband applications.
Bishal Bhandari, Sang-Shin Lee
doaj   +1 more source

Linear atomic quantum coupler [PDF]

, 2009
In this paper, we develop the notion of the linear atomic quantum coupler. This device consists of two modes propagating into two waveguides, each of them includes a localized and/or a trapped atom.
Dowling J P, El-Orany F A A, El-Orany F A A, El-Orany F A A, Faisal A A El-Orany, Gusovkii D D, Horak P, Lambropoulos P, Lee P J, Lo H-K, Louisell W H, M R B Wahiddin, Nayak K P Melentiev P N Morinaga M Kien F L Balykin V I Hakuta K, Nielsen M, Petrosyan D, Peřina J, Sague G, Townsend P D, Wineland D J, Yoo H I, Yöna M   +20 more
core   +1 more source

Rafting of Ni‐Based Superalloys Under Multiaxial Load as Understood by Phase‐Field Simulations and Critical Experiments

Advanced Engineering Materials, EarlyView.
Phase‐field simulations coupled with dislocation‐density‐based crystal plasticity modeling reproduce γ′ rafting behavior in single‐crystal Ni‐based superalloys under varied loading conditions. The model captures both macroscopic creep and microscopic morphology evolution, with results matching high‐temperature creep experiments.
Micheal Younan, David Bürger, Gunther Eggeler, Oleg Shchyglo, Ingo Steinbach, Muhammad Adil Ali   +5 more
wiley   +1 more source

3D-printed Acoustic Directional Couplers [PDF]

, 2014
Acoustic Directional Couplers permit separation of forward and reverse sound pressure waves. This separation opens the way to traceable precision acoustic reflection measurements.
MacDonell, Marcus Scott Glengarry, Scott, Jonathan B.   +1 more
core   +1 more source

Additive Manufacturing of Continuous Fibre Reinforced Composites: Process, Characterisation, Modelling, and Sustainability

Advanced Engineering Materials, EarlyView.
Additive manufacturing provides precise control over the placement of continuous fibres within polymer matrices, enabling customised mechanical performance in composite components. This article explores processing strategies, mechanical testing, and modelling approaches for additive manufactured continuous fibre‐reinforced composites.
Cherian Thomas, Amir Hosein Sakhaei
wiley   +1 more source

Dispersion-enabled quantum state control in integrated photonics

, 2016
Integrated optics has brought unprecedented levels of stability and performance to quantum photonic circuits. However, integrated devices are not merely micron-scale equivalents of their bulk-optics counterparts.
Helmy, Amr S., Marchildon, Ryan P.
core   +1 more source

Non-volatile Optical Switch Based on a GST-Loaded Directional Coupler [PDF]

, 2018
We present a non-volatile optical switch based on a directional coupler comprising a silicon-Ge2Sb2Te5 (GST) hybrid waveguide. The non-volatility of GST makes it attractive for reducing static power consumption in optical switching.
Chen, J., Lu, L., Rahman, B. M., Zhang, H., Zhou, L.   +4 more
core   +1 more source

High-directivity microstrip directional couplers

Electronics Letters, 1974
The letter describes a simple method for improving the directivity of side-coupled microstrip couplers an unmetallised piece of the substrate material is cemented on top of the microstrip structure. The measured directivity ranges from 30 to 40 dB. The couplers are fully compatible with normal microstrip techniques.
G. Haupt, H. Delfs
openaire   +1 more source

A Lightweight Procedural Layer for Hybrid Experimental–Computational Workflows in Materials Science

Advanced Engineering Materials, EarlyView.
We unveil a prototype hybrid‐workflow framework that fuses automatedcomputation with hands‐on experiments. Built atop pyiron, a lightweight, parameterized layer translates procedure descriptions into executable manual steps, syncing instrument settings, human interventions, and data capture in real‐time today.
Steffen Brinckmann, Sarath Menon, Raphael Röske, Johannes Steinhülb, Michael Selzer, Jan Janssen, Tilmann Hickel, Ruth Schwaiger, Jörg Neugebauer   +8 more
wiley   +1 more source