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Rotational Doppler effect using ultra-dense vector perfect vortex beams

Photonics Research 2025年第2期13卷 468-476页

作者： JIANBO GAO XINGYUAN LU XUECHUN ZHAO ZHUOYI WANG JUNAN ZHU ZHIQUAN HU JINGJING HE QIWEN ZHAN YANGJIAN CAI CHENGLIANG ZHAO School of Physical Science and Technology Jiangsu Key Laboratory of Frontier Material Physics and DevicesSoochow UniversitySuzhou 215006China School of Optical-Electrical and Computer Engineering University of Shanghai for Science and TechnologyShanghai 200093China Shandong Provincial Engineering and Technical Center of Light Manipulations&Shandong Provincial Key Laboratory of Optics and Photonic Device School of Physics and ElectronicsShandong Normal UniversityJinan 250358China Shandong Joint Research Center of Light Manipulation Science and Photonics Integrated Chip of East China Normal University and Shandong Normal University East China Normal UniversityShanghai 200241China

The rotational Doppler effect holds significant potential for remote sensing of rotating objects due to its real-time performance and non-contact advantages.A single-ring beam is used to measure rotation *** enhance the signal-to-noise ratio and measure additional parameters,multiple rings are introduced in the context of a rotational Doppler ***,the interference between these rings poses a challenge for multitasking detection *** this study,cross-polarization superposition was applied to generate an ultra-dense vector perfect vortex beam that exhibited sensitivity to spatial position and object size,and flexibility in designing topological charge combinations for generating frequency combs.A proof-of-principle experiment was conducted to demonstrate its capability in improving the signal-to-noise ratio,and accurately perceiving both the radius of rotation and radial *** ultra-dense vector perfect vortex beam provides a general strategy for beam construction and the multi-parameter perception of rotating objects,thereby enabling potential applications in the measurement of velocity gradient measurement of fluids.

关键词： multitasking detection rotating objects ultra dense vector perfect vortex beam remote sensing frequency combs rotational doppler effect rotational Doppler effect cross polarization superposition

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Trade Study Benchmarking Ferrite and Nanocrystalline Based Medium Frequency Transformer Technology with Numerical Modelling

Trade Study Benchmarking Ferrite and Nanocrystalline Based M...

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IEEE Electric Ship Technologies Symposium, ESTS

作者： Mohendro Kumar Ghosh Chris Bracken Mark Juds Bharadwaj Reddy Andapally Brandon Grainger Paul R. Ohodnicki Department of Mechnaical Engineering and Material Science University of Pittsburgh Pittsburgh USA Companhia Brasileira de Metalurgia e Mineração CBMM Europe Amsterdam Netherlands Department of Electrical and Computer Engineering University of Pittsburgh Pittsburgh USA

Ferrite and nanocrystalline alloys are the primary magnetic materials of choice for medium and high frequency transformers because of their optimal combination of loss and saturation flux density over a wide frequency range. This paper investigates the advantages and disadvantages of both material options through two approaches. The first approach is the illustration of FEA modeling, considering the advantages and disadvantages of both ferrite and nanocrystalline cores. Leakage loss investigation for more electrically conductive nanocrystalline-based cores compared to ferrite cores, has been validated analytically and numerically in this approach. The second approach pursues design comparisons via a trade study based on analytical models chosen to show the contrasting details at the component level. This paper seeks to provide insights on core selection at different operating frequencies with an emphasis on ensuring acceptable temperature rise.

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Enhanced Memory Performance in Ferroelectric NAND Applications: The Role of Tunnel Dielectric Position for Robust 10-Year Retention

Enhanced Memory Performance in Ferroelectric NAND Applicatio...

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2025 IEEE International Reliability Physics Symposium, IRPS 2025

作者： Venkatesan, Prasanna Padovani, Andrea Fernandes, Lance Ravikumar, Priyankka Park, Chinsung Tran, Huy Wang, Zekai Jayasankar, Hari Garlapati, Amrit Song, Taeyoung Chen, Hang Chern, Winston Wang, Zheng Kim, Kijoon Woog, Jongho Lim, Suhwan Kim, Kwangsoo Kim, Wanki Ha, Daewon Yu, Shimeng Dattal, Suman Larcher, Luca Thareja, Gaurav Khanl, Asif School of Electrical and Computer Engineering Georgia Institute of Technology GA United States University of Modena and Reggio Emilia Engineering Department 'Enzo Ferrari' Italy Institute of Electronics and Nanotechnology Georgia Institute of Technology GA United States Micron Technology United States Samsung Electronics Advanced Device Research Laboratory Semiconductor Research Center South Korea School of Material Science and Engineering Georgia Institute of Technology GA United States Applied Materials United States

ISBN: (纸本)9798331504779

We report a comprehensive study on memory window (MW) enhancement and retention loss (RL) in ferroelectric (FE) field effect transistors for NAND applications with a dielectric layer inserted within the FE film (next to the gate GBL devices or in the middle of the FE layer TDL devices). Using a temperature-dependent modeling framework, we show that MW and RL properties are controlled respectively by carriers trapping into defects at the dielectric-FE interface and by its fragile balance with FE depolarization. While MW enhancement is achieved whenever the inserted dielectric layer is present, a robust retention is obtained only in TDL FEFETs, thanks to a stabilization of the trapped charge preventing FE depolarization. Simulation results clearly demonstrate that the fragile balance between above phenomena is ultimately controlled by the position of the dielectric layer, which determines i) the field redistribution within the stack, ii) the magnitude of charge de-trapping, and iii) the magnitude of the depolarization field. Our results provide critical guidelines for the improvement of FE 3D-NAND reliability. © 2025 IEEE.

关键词： 3D-NAND FEFET Ginestra™ Retention

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Long-range photodetection of organic exciton-polaritons

Long-range photodetection of organic exciton-polaritons

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CLEO: science and Innovations, S and I 2022

作者： Liu, Bin Huang, Xinjing Forrest, Stephen R. Department of Electrical Engineering and Computer Science University of Michigan Ann ArborMI48109 United States Applied Physics Program University of Michigan Ann ArborMI48109 United States Department of Physics University of Michigan Ann ArborMI48109 United States Department of Material Science and Engineering University of Michigan Ann ArborMI48109 United States

In light-matter strong coupling regime, we observe long-range photodetection response at room temperature mediated by organic exciton-polaritons, which results from strong interactions between organic excitons and low... 详细信息

ISBN: (纸本)9781557528209

关键词： Excitons

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JARVIS-Leaderboard:a large scale benchmark of materials design methods

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npj Computational materials 2024年第1期10卷 2280-2296页

作者： Kamal Choudhary Daniel Wines Kangming Li Kevin F.Garrity Vishu Gupta Aldo H.Romero Jaron T.Krogel Kayahan Saritas Addis Fuhr Panchapakesan Ganesh Paul R.C.Kent Keqiang Yan Yuchao Lin Shuiwang Ji Ben Blaiszik Patrick Reiser Pascal Friederich Ankit Agrawal Pratyush Tiwary Eric Beyerle Peter Minch Trevor David Rhone Ichiro Takeuchi Robert B.Wexler Arun Mannodi-Kanakkithodi Elif Ertekin Avanish Mishra Nithin Mathew Mitchell Wood Andrew Dale Rohskopf Jason Hattrick-Simpers Shih-Han Wang Luke E.K.Achenie Hongliang Xin Maureen Williams Adam J.Biacchi Francesca Tavazza Material Measurement Laboratory National Institute of Standards and TechnologyGaithersburgMD20899USA Department of Materials Science and Engineering University of Toronto27 King’s College CirTorontoONCanada Department of Electrical and Computer Engineering Northwestern UniversityEvanstonIL 60208USA Lewis-Sigler Institute for Integrative Genomics Princeton UniversityPrincetonNJ 08544USA Ludwig Institute for Cancer Research Princeton UniversityPrincetonNJ 08544USA Department of Physics and Astronomy West Virginia UniversityMorgantownWV 26506USA Materials Science and Technology Division Oak Ridge National LaboratoryOak RidgeTN 37831USA Center for Nanophase Materials Science Oak Ridge National LaboratoryOak RidgeTN 37831USA Computational Sciences and Engineering Division Oak Ridge National LaboratoryOak RidgeTN 37831USA Department of Computer Science and Engineering Texas A&M UniversityCollege StationTX 77843USA Globus University of ChicagoChicagoIL 60637USA Data Science and Learning Division Argonne National LabLemontIL 60439USA Institute of Nanotechnology Karlsruhe Institute of TechnologyKaiserstraße 1276131 KarlsruheGermany Institute of Theoretical Informatics Karlsruhe Institute of TechnologyKaiserstraße 1276131 KarlsruheGermany Department of Chemistry and Biochemistry and Institute for Physical Science and Technology University of MarylandCollege ParkMD 20742USA Department of Physics Applied Physics and AstronomyRensselaer Polytechnic InstituteTroyNY12180USA Department of Materials Science and Engineering University of MarylandCollege ParkMD20742USA Department of Chemistry and Institute of Materials Science and Engineering Washington University in St.LouisSt.LouisMO63130USA School of Materials Engineering Purdue UniversityWest LafayetteIN47907USA Department of Mechanical Science and Engineering University of Illinois Urbana-ChampaignUrbanaIllinois 61801USA Materials Research Laboratory University of Illinois Urbana-ChampaignUrbanaIL 61801USA Theore

Lack of rigorous reproducibility and validation are significant hurdles for scientific development across many *** science,in particular,encompasses a variety of experimental and theoretical approaches that require careful *** efforts have been developed previously to mitigate these ***,a comprehensive comparison and benchmarking on an integrated platform with multiple data modalities with perfect and defect materials data is still *** work introduces JARVIS-Leaderboard,an open-source and community-driven platform that facilitates benchmarking and enhances *** platform allows users to set up benchmarks with customtasks and enables contributions in the form of dataset,code,and meta-data *** cover the following materials design categories:Artificial Intelligence(AI),Electronic Structure(ES).

关键词： rigorous perfect enable

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Evaluating Common Electronic Components and GaN HEMTs under Cryogenic Conditions

Evaluating Common Electronic Components and GaN HEMTs under ...

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2021 IEEE Southern Power Electronics Conference, SPEC 2021

作者： Wadsworth, Aaron Pais, Brandon Kyle, Shaun Thrimawithana, Duleepa J. Badcock, Rodney A. Lapthorn, Andrew Heffernan, Bill Oliver, Rachel A. Wallis, David J. Neuberger, Martin University of Auckland Dept. of Electrical and Computer Engineering New Zealand Robinson Research Institute Victoria University of Wellington New Zealand University of Canterbury Dept. of Electrical and Computer Engineering New Zealand University of Cambridge Dept. of Material Science and Metallurgy United Kingdom Esslingen University of Applied Sciences Dept. of Mechatronics Electrical Engineering Germany

ISBN: (纸本)9781665436236

Superconducting motors are a solution to electrifying large scale transport (aviation, rail, shipping) due to their superior power density over conventional electric motors. Cooling a superconducting motor and its power converter using the same cryogenic system provides a unique opportunity to increase the converter's power density. This paper evaluates how conventional power converter components and emerging Gallium Nitride (GaN) technologies would fare at cryogenic temperatures. It is shown that GaN devices have a significant reduction in conduction losses at cryogenic temperatures. The behaviour of integrated circuits varies depending on device technology (CMOS, BJT, JFET), while temperature variation in capacitors depends on their dielectric material. © 2021 IEEE.

关键词： Wide band gap semiconductors

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Risk-Averse No-Regret Learning in Online Convex Games

arXiv

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arXiv 2022年

作者： Wang, Zifan Shen, Yi Zavlanos, Michael M. School of Electrical Engineering and Computer Science KTH Royal Institute of Technology Stockholm Sweden Department of Mechanical Engineering & Material Science Duke University DurhamNC27708 United States

We consider an online stochastic game with risk-averse agents whose goal is to learn optimal decisions that minimize the risk of incurring significantly high costs. Specifically, we use the Conditional Value at Risk (CVaR) as a risk measure that the agents can estimate using bandit feedback in the form of the cost values of only their selected actions. Since the distributions of the cost functions depend on the actions of all agents that are generally unobservable, they are themselves unknown and, therefore, the CVaR values of the costs are difficult to compute. To address this challenge, we propose a new online risk-averse learning algorithm that relies on one-point zeroth-order estimation of the CVaR gradients computed using CVaR values that are estimated by appropriately sampling the cost functions. We show that this algorithm achieves sub-linear regret with high probability. We also propose two variants of this algorithm that improve performance. The first variant relies on a new sampling strategy that uses samples from the previous iteration to improve the estimation accuracy of the CVaR values. The second variant employs residual feedback that uses CVaR values from the previous iteration to reduce the variance of the CVaR gradient estimates. We theoretically analyze the convergence properties of these variants and illustrate their performance on an online market problem that we model as a Cournot game. © 2022, CC BY.

关键词： Learning algorithms

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Plasma Jet Deposition and Self-Sintering of Gold Nanoparticle Ink for Flexible Electronics

Plasma Jet Deposition and Self-Sintering of Gold Nanoparticl...

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International Flexible Electronics Technology Conference (IFETC)

作者： Jacob Manzi Tony Varghese Anupama Dhamala Lakshmi Prakasan Josh Eixenberger Nirmala Kandadai David Estrada Harish Subbaraman School of Electrical Engineering and Computer Science Oregon State University Corvallis OR USA Micron School of Material Science and Engineering Boise State University Boise ID USA Department of Electrical and Computer Engineering Boise State University Boise ID USA Center for Advanced Energy Studies Boise State University Boise ID USA Idaho National Laboratory Idaho Falls ID USA

Additive manufacturing has become a promising method for the fabrication of inexpensive, green, flexible electronics. Printed electronics on low-temperature substrates like paper are very appealing for the flexible hybrid electronics market for their use in disposable and biocompatible electronic applications and in areas like packaging, wearables, and consumer electronics. Plasma-jet printing uses a dielectric barrier discharge plasma to focus aerosolized nanoparticles onto a target substrate. The same plasma can be used to change the properties of the printed material and even sinter in situ. The technology can also be utilized in space and microgravity environments since the plasma-assisted deposition is independent of gravity. In this work, we show plasma voltage effect on deposition of gold nanoparticles and direct printing of flexible, conductive gold structures onto low-temperature paper substrates without the need for thermal or photonic post-processing. The effects of plasma parameters on the conductivity and flexible reliability of the printed films are studied, and a paper-based LED electrode is demonstrated.

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Fabrication of Gyroid-Structured Metal/Semiconductor Nanoscaffolds with Ultrasensitive SERS Detection via Block Copolymer Templating

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Advanced Optical materials 2023年第2期11卷

作者： Lu, Ying-Chun Tseng, Pei-Chieh Yang, Min-Jung Wang, Cheng-Jie Ling, Yi-Chun Lin, Chia-Feng Hsueh, Han-Yu Department of Material Science and Engineering National Chung Hsing University Taichung40227 Taiwan Department of Electrical and Computer Engineering University of California DavisCA95616 United States National Chung Hsing University Taichung40227 Taiwan

Surface-enhanced Raman scattering (SERS) is a label-free and powerful technique for monitoring dynamic molecular processes with high sensitivity and reproducibility. SERS has diverse applications in medicine, molecular science, biology, and chemical sensing. In this study, a template-based approach to create an ultrasensitive SERS-active substrate is proposed which involves combining nanostructured semiconductors and noble metals. A nanoporous polymer obtained from hydrolyzed gyroid-forming polystyrene-block-poly(l-lactide) (i.e., PS-b-PLLA) is used as a template for Ag reduction and TiO2 sol–gel reaction. After calcination to remove the polymeric template, TiO2 nanoscaffolds appear as self-supporting 3D nanoobjects with homogeneously and closely distributed Ag nanoparticles, providing a high density of regions with intense local field enhancement (hotspots). Rhodamine 6G molecules are used as probe molecules to demonstrate the SERS performance, revealing a markedly high average enhancement factor of up to 1014. The intrinsic photocatalytic properties of TiO2 can degrade target organic chemicals for the self-cleaning and reproduction of SERS-active substrates. Moreover, a simple hydrazine reduction-based approach is applied for the formation of regenerated Ag/TiO2 nanoscaffolds to reduce the use of Ag-based SERS-active substrates, decreasing the costs associated with relevant industrial processes. © 2022 Wiley-VCH GmbH.

关键词： Titanium dioxide

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Optical spectroscopy of excitons in ReS2 monolayers grown by chemical vapor deposition

arXiv

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arXiv 2024年

作者： Ojo, Solomon Onasanya, Juwon Benamara, Morad Hamad, Bothina Manasreh, M.O. Material Science and Engineering program University of Arkansas FayettevilleAR72701 United States Institute of nanotechnology University of Arkansas FayettevilleAR72701 United States Physics Department University of Arkansas FayettevilleAR72701 United States Department of Electrical Engineering and Computer Science University of Arkansas FayettevilleAR72701 United States

Monolayers of ReS2 were grown by a chemical vapor deposition technique on SiO2/Si substrates and investigated at room temperature by using μ-Raman, μ-photoluminescence (PL) and absorbance spectroscopies. The Raman scattering spectrum exhibits several phonon modes that were confirmed by the computation analysis based on the density functional theory. The ReS2 structural integrity was confirmed by using the XRD and the energy dispersion spectroscopy that was obtained by the scanning electron microscopy. Photoluminescence spectra show excitons related to interband transition in thin monolayer flakes and bulk-like structures. Additionally, a sharp PL line located at 1.2620 eV with a second harmonic peak at 2.5420 eV were observed and explained in terms of interband excitonic transitions originated within the rhenium 5d orbit. An optical absorbance spectrum with an exciton peak around 1.4660 eV was obtained for an assembly of ReS2 flakes grown on silica substrate. Copyright © 2024, The Authors. All rights reserved.

关键词： Scanning electron microscopy

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