aaron charous
Graduate Student Research at Massachusetts Institute of Technology
phd student computational science & engineering mechanical engineering
phd student mit studying computational science engineering mechanical engineering department . work state-of-the-art numerical technique solve computationally intensive problem . word , create fast accurate algorithm solve really big problem ! undergraduate , studied applied mathematics electrical engineering brown university . interest include bayesian inverse problem , reduced-order modeling , uncertainty quantification , stochastic differential equation , digital signal processing , wave phenomenon ( e.g . acoustic optic ) . one particularly interesting application work seabed imaging ! past , explored blind semi-blind source separation algorithm applied musical signal use real-time visualization . also worked optic lab studying fundamental device use terahertz technology .
Massachusetts Institute of Technology
https://www.linkedin.com/company/mit
I am a graduate student in the Multidisciplinary Simulation, Estimation, and Assimilation Systems (MSEAS) lab. We work on numerical techniques for uncertainty quantification and data assimilation in ocean dynamics, acoustics, optimal path planning, and more! For current projects, see http://mseas.mit.edu/?page_id=26.
Cambridge, Massachusetts
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Graduate Student Research
Brown University
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Working in the Mittleman Lab at Brown University, I have studied the behavior of terahertz beams on an array of subwavelength parallel-plate waveguides.  In particular, I formulated a mathematical model to explain the complex behavior of the device on transmitted and reflected beams. I also explored the behavior of leaky waveguides via simulation and created an analytical model using ray optics to predict the spatio-frequency response of the transmitted energy.
Providence, Rhode Island
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Research in Terahertz Optics
Brown University
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Undergraduate Teaching Assistant for Applied Ordinary Differential Equations in Department of Applied Mathematics
Providence, Rhode Island
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Undergraduate Teaching Assistant
IMC - Financial Markets
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Delta One Trading Desk
Chicago, IL
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Quantitative Trading Intern
Fullerton Engineering Consultants, Inc.
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Schaumburg, IL
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Intern
Mathnasium
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Glenview, IL
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Math Instructor
Doctor of Philosophy - PhD
Computational Science & Engineering and Mechanical Engineering
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Massachusetts Institute of Technology
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Master of Science - SM
Computational Science & Engineering
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Massachusetts Institute of Technology
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Bachelor of Science - ScB
Applied Mathematics & Engineering
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Brown University
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High School
Glenbrook North High School
Of the many challenges in building a wireless network at terahertz frequencies, link discovery remains one of the most critical and least explored. In a network of mobile receivers using narrow directional beams, how do the nodes rapidly locate each other? This direction information is crucial for beam forming and steering, which are fundamental operations for maintaining link quality. As the carrier frequency increases into the terahertz range, the conventional methods used by existing networks become prohibitively time-consuming, so an alternative strategy is required. Using a leaky-wave antenna with a broadband transmitter, we demonstrate a single-shot approach for link discovery which can be accomplished much more rapidly. Our method relies on measurements of the width of a broad spectrum, and does not require any information about the phase of the received signal. This protocol, which relies on a detailed understanding of the radiation from leaky-wave devices, offers a realistic approach for enabling mobility in directional networks.
Single-shot link discovery for terahertz wireless networks
Nature Communications
https://doi.org/10.1038/s41467-020-15761-4
The spatial profile of a beam can experience complicated reshaping after interacting with a planar resonator near resonant conditions. Previously, this phenomenon was recognized as the Goos–Hänchen effect, which only partially explains the experimental observations. In this Letter, we introduce a 2D model that can fully describe the resonance-induced spatial reshaping. The model predicts several general features of the output beam profile and suggests that optical phase or polarization vortices can be generated and manipulated by an arbitrary planar resonator. We validate our theoretical results with experimental measurements using terahertz spectroscopy.
Characteristics of resonance-induced optical vortices and spatial reshaping
Optics Letters
https://doi.org/10.1364/OL.44.005800
Accurately characterizing the width of a narrow (high 𝑄) resonance can be quite challenging, requiring either a high-resolution grating spectrometer or a Fourier transform spectrometer with a long delay range. Here, we describe a new technique to determine the 𝑄 of a resonance based on spatial measurements that is not subject to the same limitations as conventional methods. We theoretically show that this technique can give an accurate measurement of 𝑄 for essentially any set of input beam parameters, even if the spectral resolution of the measurement is inadequate to resolve the linewidth of the resonance. We confirm this striking result with both numerical simulations and experimental measurements.
Characterizing optical resonances using spatial mode reshaping
Optica
https://www.osapublishing.org/optica/abstract.cfm?uri=optica-5-11-1414&origin=search
Abstract: The creation of artificial structures with very narrow spectral features in the terahertz range has been a long-standing goal, as they can enable many important applications. Unlike in the visible and infrared, where compact dielectric resonators can readily achieve a quality factor (Q) of 10^6, terahertz resonators with a Q of 10^3 are considered heroic. Here, we describe a new approach to this challenging problem, inspired by the phenomenon of extraordinary optical transmission (EOT) in 1D structures. In the well-studied EOT problem, a complex spectrum of resonances can be observed in transmission through a mostly solid metal structure. However, these EOT resonances can hardly exhibit extremely high Q, even in a perfect structure with lossless components. In contrast, we show that the inverse structure, a periodic array of very thin metal plates separated by air gaps, can exhibit non-trivial bound states in the continuum (BICs) reflection resonances, with arbitrarily high Q, and with peak reflectivity approaching 100% even for a vanishingly small metal filling fraction. Our analytical predictions are supported by numerical simulations, and also agree well with our experimental measurements. This configuration offers a new approach to achieving ultra-narrow optical resonances in the terahertz range, as well as a new experimentally accessible configuration for studying BICs.
Extraordinary optical reflection resonances and bound states in the continuum from a periodic array of thin metal plates
Optics Express
https://www.osapublishing.org/oe/abstract.cfm?uri=oe-26-10-13195&origin=search
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Pittsburgh, PA
Cooper Lorsung
PhD Student in Mechanical Engineering at Carnegie Mellon University
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Dallas-Fort Worth Metroplex
Jacob Spitz
Associate at Kainos Capital
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Northbrook, IL
Adam Goldsher
Chair of SIGPwny Offensive Cyber Security group
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Pittsburgh, PA
Georges Saliba
PhD Student chez Carnegie Mellon University
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Gurnee, IL
Lucas Koppenhoefer
Inventory & Work Planner at Mad Dash, Inc.
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Pittsburgh, PA
Owen Pearl
MechE PhD Candidate at Carnegie Mellon University (Musculoskeletal Biomechanics Lab + Micro Robotics Lab)
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Roselle, IL
Patti Howerton
Owner at Pals For Pups
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Beverly Hills, CA
samuel smith
physician at self
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Zion, IL
Camillia Colón
Sr. Relocation Coordinator at AbbVie
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Vernon Hills, IL
Jamie Epstein
Executive Director/Non-Profit Leader
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Pittsburgh, PA
Hai Wei Liang
Ph.D. student, Epidemiology program
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United States
Sheela Devadas
Postdoctoral Fellow at University of Washington
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United States
Lalita Devadas
PhD Student at Massachusetts Institute of Technology
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Northbrook, IL
Barb Schroeder
Real Estate Broker at @properties
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Chicago, IL
Yazmin Pichardo
Manager/Agent at Oxford Auto Insurance
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Highland Park, IL
Lorenzo DiVito
Director Of Development at Glencoe Developers LLC
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Middletown, DE
Bryan Tiamson
University of Delaware
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New York, NY
Jennifer Allen
PhD Student at MIT Sloan School of Management
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Greater Chicago Area
Het Thakore
Undergraduate student at University of Illinois at Chicago majoring Mechanical Engineering. Actively seeking internship opportunities in Mechanical Engineering
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Austin, TX
Aurosmita Khansama
System Validation Engineer @ Intel | MS in Computer Engineering @ Texas A&M University
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Bhavya earned her master’s degree in Information Systems from Northeastern University in Boston. After she graduated, she joined McKinsey as a full…
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Senior Tanner Bonner is an ardent advocate for first-generation and low-income students at MIT. “I love to think about systems and society, and how…
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Equidock, the machine learning system researchers developed, can directly predict a protein complex like this in a matter of seconds.
MIT Center for Computational Science & Engineering
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