Results 81 to 90 of about 15,288 (305)

Wavelength flattened directional couplers for mirrorsymmetric interferometers

, 2005
In the context of guided optics, we derive, analytically and geometrically, a rigorous general criterion to design wavelength insensitive interferometers with mirror symmetry, which are needed for wavelength multiplexing/demultiplexing.
Cherchi, Matteo, Tormen, Maurizio
core   +1 more source

Creep Properties and Deformation Mechanism of Additively Manufactured NiAl‐CrMo Composites

Advanced Engineering Materials, EarlyView.
Additively manufactured NiAl‐CrMo composites contain numerous interfaces and cell boundaries that control their creep response. At 700°C under high applied stress, creep is dominated by dislocation‐controlled power‐law mechanisms. At 800°C–900°C and lower stresses, creep is primarily diffusion‐controlled along cell boundaries.
Jan Vollhüter, Andreas Bezold, Johan Westraadt, Katharina Fiegl, Subham Chattoraj, Benjamin Wahlmann, Carolin Körner, Michael Mills, Mathias Göken, Steffen Neumeier   +9 more
wiley   +1 more source

Design of Compact and Wideband Groove Gap Waveguide-Based Directional Couplers

IEEE Access
This paper proposes a compact cross-shaped groove gap waveguide structure for creating wideband and compact directional couplers with different coupling levels.
Mahdieh Rabbanifard, Davood Zarifi, Ali Farahbakhsh, Michal Mrozowski   +3 more
doaj   +1 more source

Review of Substrate Integrated Waveguide Circuits for Beam-Forming Networks Working in X-Band

Applied Sciences, 2019
A review of substrate integrated waveguide (SIW) components designed for the use in beam-forming networks working in X-Band is presented. The proposed devices are four-port and six-port couplers and magic tees for the network.
Giuseppe Venanzoni, Davide Mencarelli, Antonio Morini, Marco Farina, Francesco Prudenzano   +4 more
doaj   +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

Direct Metal Deposition of Graphene–Ti28Nb35.4Zr Matrix Composites With Enhanced Mechanical, Corrosion, and Biocompatibility Properties for Bone Implants

Advanced Engineering Materials, EarlyView.
Graphene nanoplatelet (0.1 wt.%) reinforcement significantly enhances the performance of β Ti‐28Nb‐35.4Zr alloy. Grain refinement, reduced water contact angle, and improved surface characteristics promote osteoblast adhesion and complete surface coverage after 7 days.
Khurram Munir, Jixing Lin, Yuncang Li, Li Zhu, Paul F. A. Wright, Cuie Wen   +5 more
wiley   +1 more source

Conformal Mapping Design Tools for Coaxial Couplers with Complex Cross Section [PDF]

, 2002
Numerical conformal mapping is exploited as a simple, accurate, and efficient tool for the analysis and design of coaxial waveguides and couplers of complex cross section. An implementation based on the Schwarz-Christoffel Toolbox, a public-domain MATLAB
Ferrero, Andrea Pierenrico, Goano, Michele, Teppati, Valeria   +2 more
core   +1 more source

Advancing Electronic Application of Coordination Solids: Enhancing Electron Transport and Device Integration via Surface‐Mounted MOFs (SURMOFs)

Advanced Functional Materials, EarlyView.
The layer‐by‐layer (LbL) assembly of coordination solids, enabled by the surface‐mounted metal‐organic framework (SURMOF) platform, is on the cusp of generating the organic counterpart of the epitaxy of inorganics. The programmable and sequential SURMOF protocol, optimized by machine learning (ML), is suited for accessing high‐quality thin films of ...
Zhengtao Xu, Christof Wöll, Stefan Bräse   +2 more
wiley   +1 more source

Coupling tunable D-band directional coupler for millimeter-wave applications

, 2018
A coupling tunable D-band directional coupler is designed based on a novel coupling grid structure proposed in this letter. The designed directional coupler has excellent performance with ultra-wideband.
Liu, Fukun, Xu, Handong, Xu, Weiye
core   +1 more source

Subwavelength metamaterial engineering for silicon photonics [PDF]

, 2017
Waveguides structured at the subwavelength scale frustrate di raction and behave as optical metamaterials with controllable refractive index. These structures have found widespread applications in silicon photonics, ranging from sub-decibel e ciency ...
Cheben, Pavel, Halir, Robert, Janz, Siegfried, Lapointe, Jean, Luque-González, Jose Manuel, Mashanovich, Goran, Molina-Fernandez, Iñigo, Nedeljkovic, Milos, Ortega-Moñux, Alejandro, Sarmiento-Merenguel, Darío, Schmid, Jens, Soler-Penades, Jordi, Sánchez-Postigo, Alejandro, Wanguemert-Perez, Juan Gonzalo, Xu, Dan-Xia   +14 more
core   +1 more source