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2024 Frontiers in Optics, FiO 2024

作者： Chakraborty, Uttara Gao, Zhengqi Boning, Duane S. Microsystems Technology Laboratories Department of Electrical Engineering and Computer Science Massachusetts Institute of Technology 77 Massachusetts Avenue CambridgeMA02139 United States

We use Bayesian optimization with a new tunable acquisition function to design a photonic Y-splitter robust to fabrication *** to conventional acquisition functions, our method yields more robust solutions across vary... 详细信息

关键词： Photonics

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Monolithically 3D-Printed, Miniature Solenoids with Soft Magnetic Core for Compact Systems 13

Monolithically 3D-Printed, Miniature Solenoids with Soft Mag...

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13th International Conference on Power, Energy and electrical engineering, CPEEE 2023

作者： Cañada, Jorge Velásquez-García, Luis Fernando Massachusetts Institute of Technology Electrical Engineering and Computer Science Department CambridgeMA United States Massachusetts Institute of Technology Microsystems Technology Laboratories CambridgeMA United States

ISBN: (纸本)9781665490146

We report the design, fabrication, and characterization of the first monolithically 3D-printed, three-dimensional, three-material, cored inductors for use in compact electromagnetic systems. Additive manufacturing technologies can produce functional, freeform-compatible mechanical devices;however, the ability of additive manufacturing to create electronic components that could enable the monolithic fabrication of devices that integrate sensors and actuators is still unfulfilled. This study aims at advancing the state of the art through the demonstration of the first truly three-dimensional, monolithically 3D-printed, cored solenoids. The novel 3D-printed inductors are made via material extrusion using three PLA-based materials (dielectric, conductive, and soft magnetic). The devices attain Gauss-level magnetic fields while drawing tens-of-milliamps currents. The work is of great interest for fast and inexpensive fabrication of compact sensors, actuators, and power conversion systems, and for the integration of electronics with MEMS devices of intricate geometries. © 2023 IEEE.

关键词： Solenoids

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Automatic synthesis of light-processing functions for programmable photonics:theory and realization

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Photonics Research 2023年第4期11卷 643-658页

作者： ZHENGQI GAO XIANGFENG CHEN ZHENGXING ZHANG UTTARA CHAKRABORTY WIM BOGAERTS DUANE S.BONING Microsystems Technology Laboratories Electrical Engineering and Computer ScienceMassachusetts Institute of TechnologyCambridgeMassachusetts 02139USA Ghent University-IMEC Department of Information TechnologyGhentBelgium Center of Nano-and Biophotonics Ghent UniversityGhentBelgium

Linear light-processing functions(e.g.,routing,splitting,filtering)are key functions requiring configuration to implement on a programmable photonic integrated circuit(PPIC).In recirculating waveguide meshes(which include loop-backs),this is usually done *** previous results describe explorations to perform this task automatically,but their efficiency or applicability is still *** this paper,we propose an efficient method that can automatically realize configurations for many light-processing functions on a square-mesh *** its heart is an automatic differentiation subroutine built upon analytical expressions of scattering matrices that enables gradient descent optimization for functional circuit *** to the state-of-the-art synthesis techniques,our method can realize configurations for a wide range of light-processing functions,and multiple functions on the same PPIC ***,we do not need to separate the functions spatially into different subdomains of the mesh,and the resulting optimum can have multiple functions using the same part of the ***,compared to nongradient-or numerical differentiation-based methods,our proposed approach achieves 3×time reduction in computational cost.

关键词： synthesis. synthesis functions

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Monolithically 3D-Printed, Miniature Solenoids with Soft Magnetic Core for Compact Systems

Monolithically 3D-Printed, Miniature Solenoids with Soft Mag...

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Power, Energy and electrical engineering (CPEEE), International Conference on

作者： Jorge Cañada Luis Fernando Velásquez-García Electrical Engineering and Computer Science Department Massachusetts Institute of Technology Cambridge MA USA Microsystems Technology Laboratories Massachusetts Institute of Technology Cambridge MA USA

We report the design, fabrication, and characterization of the first monolithically 3D-printed, three-dimensional, three-material, cored inductors for use in compact electromagnetic systems. Additive manufacturing technologies can produce functional, freeform-compatible mechanical devices; however, the ability of additive manufacturing to create electronic components that could enable the monolithic fabrication of devices that integrate sensors and actuators is still unfulfilled. This study aims at advancing the state of the art through the demonstration of the first truly three-dimensional, monolithically 3D-printed, cored solenoids. The novel 3D-printed inductors are made via material extrusion using three PLA-based materials (dielectric, conductive, and soft magnetic). The devices attain Gauss-level magnetic fields while drawing tens-of-milliamps currents. The work is of great interest for fast and inexpensive fabrication of compact sensors, actuators, and power conversion systems, and for the integration of electronics with MEMS devices of intricate geometries.

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Dynamically Tunable Magnon-Magnon Coupling in a Perpendicular Anisotropy Magnetic Garnet-Ferromagnet Bilayer

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Physical Review Letters 2025年第12期134卷 126702-126702页

作者： Yabin Fan Takian Fakhrul Justin T. Hou Chung-Tao Chou Bharat Khurana Yaroslav Tserkovnyak Luqiao Liu Caroline A. Ross Department of Materials Science and Engineering Massachusetts Institute of Technology Cambridge Massachusetts 02139 USA Department of Materials and Metallurgical Engineering Bangladesh University of Engineering and Technology Dhaka 1000 Bangladesh Department of Electrical Engineering and Computer Science Massachusetts Institute of Technology Cambridge Massachusetts 02139 USA Microsystems Technology Laboratories Massachusetts Institute of Technology Cambridge Massachusetts 02139 USA Department of Physics Massachusetts Institute of Technology Cambridge Massachusetts 02139 USA Department of Physics and Astronomy University of California Los Angeles Los Angeles California 90095 USA

We experimentally explore the interfacial coherent spin pumping in the magnon-magnon hybridized regime of a perpendicular anisotropy ferrimagnetic insulator (Bi-substituted yttrium iron garnet, or BiYIG) and ferromagnetic metal (permalloy, or Py) bilayer. In addition to the interfacial exchange coupling-induced avoided crossings between the uniform modes of BiYIG and Py, we observe that the gap opening can be tailored by changing the relative orientations of the BiYIG and Py magnetizations due to a purely dynamic interaction. The avoided-crossing gap opening is small (large) when BiYIG and Py magnetizations are nearly perpendicular (partially collinear) to each other, indicating that interfacial fieldlike torque from spin pumping plays a dominant role. Macrospin simulations with a sizable fieldlike spin-pumping torque agree with the gap opening trend observed in the experiments.

关键词： Anisotropy

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3D Printed, Quadrupole Mass Filter with High Filter Resolution for Detecting Carbon-13 Isotopes

3D Printed, Quadrupole Mass Filter with High Filter Resoluti...

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International Conference on Vacuum Nanoelectronics (IVNC)

作者： Colin C. Eckhoff Hyeonseok Kim Luke J. Metzler Randall E. Pedder Luis Fernando Velásquez-García Department of Electrical Engineering and Computer Science Massachusetts Institute of Technology Cambridge MA USA Department of Mechanical Engineering Massachusetts Institute of Technology Cambridge MA USA Ardara Technologies LP Ardara PA USA Microsystems Technology Laboratories Massachusetts Institute of Technology Cambridge MA USA

We report the design, fabrication, and characterization of additively manufactured quadrupole mass filters with sufficient resolution and sensitivity to detect carbon-13 isotopes. This is a new milestone for 3D-printe... 详细信息

ISBN: (数字)9798350379761

ISBN: (纸本)9798350379778

关键词： Fabrication Filters Three-dimensional displays Sensitivity Mass spectroscopy Isotopes Nanoelectronics

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High Breakdown Electric Field (> 5 MV/cm) in UWBG AlGaN Transistors

arXiv

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arXiv 2025年

作者： Shin, Seungheon Pal, Hridibrata Pratt, Jon Niroula, John Zhu, Yinxuan Joishi, Chandan Klein, Brianna A. Armstrong, Andrew Allerman, Andrew A. Palacios, Tomás Rajan, Siddharth Department of Electrical & Computer Engineering The Ohio State University ColumbusOH43210 United States Department of Materials Science & Engineering The Ohio State University ColumbusOH43210 United States Microsystems Technology Laboratories Massachusetts Institute of Technology CambridgeMA02139 United States Sandia National Laboratories AlbuquerqueNM87123 United States

We report on the design and demonstration of ultra-wide bandgap (UWBG) AlGaN-channel metal-insulator heterostructure field effect transistors (HEFTs) for high-power, high-frequency applications. We find that the integration of gate dielectrics and field plates greatly improves the breakdown field in these devices, with state-of-art average breakdown field of 5.3 MV/cm (breakdown voltage > 260 V) with an associated maximum current density of 342 mA/mm, and cutoff frequency of 9.1 GHz. Furthermore, low trap-related impact was observed from minimal gate and drain lag estimated from pulsed I-V characteristics. The reported results provide the potential of UWBG AlGaN HEFTs for the next generation high-power radio frequency applications. Copyright © 2025, The Authors. All rights reserved.

关键词： Electric breakdown of solids

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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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An Enhanced Resource Selection Scheme for Efficient Intra-Platoon Message Delivery

An Enhanced Resource Selection Scheme for Efficient Intra-Pl...

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2024 IEEE Global Communications Conference, GLOBECOM 2024

作者： Wang, Bingying Zheng, Jun Li, Cheng Nanjing University of Information Science and Technology School of Electronics and Information Engineering Nanjing210044 China Southeast University National Mobile Communications Research Laboratory Frontiers Science Center for Mobile Information Communication and Security Nanjing210096 China Purple Mountain Laboratories Nanjing211111 China Simon Fraser University School of Engineering Science BurnabyBCV5A 1S6 Canada Memorial University Department of Electrical and Computer Engineering St. John'sNLA1B 3X5 Canada

ISBN: (纸本)9798350351255

This paper proposes an enhanced resource selection (eInP-RS) scheme for efficient intra-platoon message delivery of cooperative awareness messages (CAMs) and decentralized environmental notification messages (DENMs). To achieve this goal, the eInP-RS scheme allows each vehicle to transmit CAM and DENM packets on a C-V2X channel (CH1) and an 802.11p channel (CH2), separately, and introduces four mechanisms to enhance the standardized sensing-based SPS scheme. A contention window (CW) size adjustment mechanism is introduced to enable a vehicle to adjust its CW size according to the information it collects on CH1 in order to avoid potential packet collisions on CH2;a resource partition mechanism is introduced to divide frequency-time resources in a selection window into two sets in order for vehicles moving in opposite directions to select different resources and thus avoid potential merging collisions on CH1;an intra-platoon cooperation mechanism is introduced to enable the PL of a platoon to know the resource and channel occupation information of the platoon's hidden nodes on CH1 and CH2;and a packet collision detection mechanism is used to enable a non-platoon vehicle to detect packet collisions occurring on both channels after a lane-changing maneuver to avoid potential merging collisions. Simulation results show that the proposed eInP-RS scheme outperforms the standardized sensing-based SPS scheme in terms of the intra-platoon CAM/DENM delivery ratio and the average intra-platoon DENM delivery delay. © 2024 IEEE.

关键词： Magnetic levitation vehicles

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Provable Routing Analysis of Programmable Photonics

arXiv

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arXiv 2023年

作者： Gao, Zhengqi Chen, Xiangfeng Zhang, Zhengxing Lai, Chih-Yu Chakraborty, Uttara Bogaerts, Wim Boning, Duane S. Microsystems Technology Laboratories Electrical Engineering and Computer Science Massachusetts Institute of Technology CambridgeMA02139 United States Ghent University - IMEC Department of Information Technology Gent Belgium Center of Nano- and Biophotonics Ghent University Gent Belgium

Programmable photonic integrated circuits (PPICs) are an emerging technology recently proposed as an alternative to custom-designed application-specific integrated photonics. Light routing is one of the most important functions that need to be realized on a PPIC. Previous literature has investigated the light routing problem from an algorithmic or experimental perspective, e.g., adopting graph theory to route an optical signal. In this paper, we also focus on the light routing problem, but from a complementary and theoretical perspective, to answer questions about what is possible to be routed. Specifically, we demonstrate that not all path lengths (defined as the number of tunable basic units that an optical signal traverses) can be realized on a square-mesh PPIC, and a rigorous realizability condition is proposed and proved. We further consider multi-path routing, where we provide an analytical expression on path length sum, upper bounds on path length mean/variance, and the maximum number of realizable paths. All of our conclusions are proven mathematically. Illustrative potential optical applications using our observations are also presented. © 2023 Optica Publishing Group Copyright © 2023, The Authors. All rights reserved.

关键词： Graph theory

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