Results 71 to 80 of about 878,822 (292)

Photonic Time Crystals and Time‐Varying Electromagnetic Metamatter: A New Direction for Ultrafast Tunable Photonic and Microwave Materials and Devices

Advanced Science, EarlyView.
Photonic time crystals (PTCs) are systems in which electromagnetic parameters are modulated periodically in time, producing momentum bandgaps via temporal scattering rather than spatial Bragg processes. This review examines the theoretical frameworks, modeling, and computational tools for time‐varying media, and summarizes experimental demonstrations ...
Ranjan Kumar Patel, Shriram Ramanathan, Ronald P. Jenkins, Michael J. Carter   +3 more
wiley   +1 more source

Advances and Perspectives in Graphene‐Based Quantum Dots Enabled Neuromorphic Devices

Advanced Science, EarlyView.
Graphene‐based QDs are zero‐dimensional carbon nanomaterials with pronounced quantum confinement and tunable electronic structures. Herein, we summarize their synthesis strategies and functionalization methods, and highlight their functional roles and operating mechanisms in devices, as well as recent advances in neuromorphic electronics. We anticipate
Yulin Zhen, Wei Zeng, Zherui Zhao, JiYu Zhao, Ziyan Huang, Zhuo Chen, Kui Zhou, Guanglong Ding, Su‐Ting Han, Ye Zhou   +9 more
wiley   +1 more source

Direct-synthesis design technique for non-linear microwave circuits

, 1995
A novel Design technique for the direct synthesis of large-signal microwave circuits is presented. It is based on an equivalent linear representation of the nonlinear circuit directly derived from an exact nonlinear method, e.g., of the harmonic balance ...
GIANNINI, FRANCO, Leuzzi, G, LIMITI, ERNESTO, COLANTONIO, PAOLO   +3 more
core   +2 more sources

A Radar Echo Simulator for the Synthesis of Randomized Training Data Sets in the Context of AI-Based Applications

Sensors
Supervised machine learning algorithms usually require huge labeled data sets to produce sufficiently good results. For many applications, these data sets are still not available today, and the reasons for this can be manifold. As a solution, the missing
Jonas Schorlemer, Jochen Altholz, Jan Barowski, Christoph Baer, Ilona Rolfes, Christian Schulz   +5 more
doaj   +1 more source

Covalently Integrated Selenoviologen–N‐Heterocyclic Carbene–Pt Nanoparticles for Visible‐Light‐Driven Hydrogen Evolution

Advanced Science, EarlyView.
A covalently integrated single‐component photocatalyst is constructed by anchoring selenoviologen to platinum nanoparticles via robust N‐heterocyclic carbene ligands. The resulting Pt─C covalent bonds function dually as protective structural scaffolds and direct channels for ultrafast intramolecular electron transfer This precise interfacial ...
Wenxi He, Guoping Li, Chenjing Liu, Yu Liu, Yawen Li, Wenxin Wei, Hairui Lei, Ni Yan, Gang He   +8 more
wiley   +1 more source

Approaching soft X-ray wavelengths in nanomagnet-based microwave technology

Nature Communications, 2016
Integrating spin waves with microwave circuits is promising for microwave nanoelectronics. Here, Yu et al. demonstrate a reconfigurable microwave-to-magnon transducer by covering yttrium iron garnet with small arrays of tailored magnetic nanodisks, which
Haiming Yu, O. d’ Allivy Kelly, V. Cros, R. Bernard, P. Bortolotti, A. Anane, F. Brandl, F. Heimbach, D. Grundler   +8 more
doaj   +1 more source

Transparent Topological Meta‐Diplexer via Tightly Confined Valley Surface States

Advanced Science, EarlyView.
An optically transparent topological metasurface supporting tightly confined valley surface states enables robust and flexible wave routing in an ultrathin platform. A compact transparent meta‐diplexer with spatially and spectrally separated channels is realized, while communication experiments verify high‐fidelity signal transmission, opening new ...
Sijie Li, Ping Li, Zhihao Lan, Yin Li, Hang Wong, Menglin L.N. Chen   +5 more
wiley   +1 more source

Advances in Se Wide‐Bandgap Photovoltaics and TexSe1‐x SWIR Photodiodes

Advanced Science, EarlyView.
In this review, fundamental properties and current challenges in Se photovoltaics (PVs) for tandem and indoor PVs and TexSe1‐x alloys for short wave infrared photodiodes are discussed. A case is made for the practicality of elemental chalcogenide optoelectronics, and a pathway toward resolving the key challenges in these respective technologies is ...
Adam D. Alfieri, Deep Jariwala
wiley   +1 more source

Hong–Ou–Mandel interferometry and quantum metrology with multimode frequency-bin entangled photons

APL Photonics
Quantum entanglement is a vital resource in quantum information processing. High-dimensional quantum entanglement offers advantages that classical systems cannot surpass, particularly in enhancing channel capacity, improving system noise resilience, and ...
Xu Jing, Linjie Fan, Xiaodong Zheng, Tangsheng Chen, Yuechan Kong, Bin Niu, Liangliang Lu   +6 more
doaj   +1 more source

Application of Memristors in Microwave Passive Circuits [PDF]

Radioengineering, 2015
The recent implementation of the fourth fundamental electric circuit element, the memristor, opened new vistas in many fields of engineering applications.
M.Potrebic, D. Tosic
doaj