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Your search keyword '"Megan Agnew"' showing total 7 results
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7 results on '"Megan Agnew"'

1. Comprehensive Modeling and Characterization of Photon Detection Efficiency and Jitter Tail in Advanced SPAD Devices

Author

Remi Helleboid, Denis Rideau, Jeremy Grebot, Isobel Nicholson, Norbert Moussy, Olivier Saxod, Marie Basset, Antonin Zimmer, Bastien Mamdy, Dominique Golanski, Megan Agnew, Sara Pellegrini, Mathieu Sicre, Christel Buj, Guillaume Marchand, Jerome Saint-Martin, Marco Pala, and Philippe Dollfus

Subjects
Avalanche breakdown probability, breakdown voltage, jitter, photon detection efficiency (PDE), single-photon avalanche diode (SPAD), technology computer-aided design (TCAD), Electrical engineering. Electronics. Nuclear engineering, TK1-9971
Abstract

A new method to reliably simulate the PDE and jitter tail for realistic three-dimensional SPAD devices is presented. The simulation method is based on the use of electric field lines to mimic the carriers’ trajectories, and on one-dimensional models for avalanche breakdown probability and charges transport. This approach allows treating a three-dimensional problem as several one-dimensional problems along each field line. The original approach is applied to the McIntyre model for avalanche breakdown probability to calculate PDE, but also for jitter prediction using a dedicated advection-diffusion model. The results obtained numerically are compared with an extensive series of measurements and show a good agreement on a wide variety of device designs.

Published
2022
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2. Payday lenders and premature mortality

Author

Megan Agnew, Megan Doherty Bea, and Terri Friedline

Subjects
payday lending, debt, health, premature death, regulation, Public aspects of medicine, RA1-1270
Abstract

Relationships between debt and poor health are worrisome as access to expensive credit expands and population health worsens along certain metrics. We focus on payday lenders as one type of expensive credit and investigate the spatial relationships between lender storefronts and premature mortality rates. We combine causes of death data from the Centers for Disease Control and Prevention (CDC) and payday lender locations at the county-level in the United States between 2000 and 2017. After accounting for county socioeconomic and demographic characteristics, the local presence of payday lenders is associated with an increased incidence risk of all-cause and specific-cause premature mortality. State regulations may attenuate these relationships, which provides insights on policy strategies to mitigate health impacts.

Published
2022
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3. Direct Measurements and Modeling of Avalanche Dynamics and Quenching in SPADs.

Author

Denis Rideau, Wilfried Uhring, R. A. Bianchi, Rémi Helleboid, Gabriel Mugny, Jérémy Grebot, Jean-Robert Manouvrier, R. Neri, F. Brun, Mohammadreza Dolatpoor Lakeh, Sven Rink, Jean-Baptiste Kammerer, Christophe Lallement, E. Lacombe, Dominique Golanski, Bruce Rae, T. M. Bah, F. Twaddle, V. Quenette, G. Marchand, Christel Buj, R. Fillon, Y. Henrion, Isobel Nicholson, Megan Agnew, M. Basset, R. Perrier, M. Al-Rawhani, Bastien Mamdy, S. Pellegrin, Gilles Gouget, P. Maciazek, Andre Juge, A. Dartigues, and Hélène Wehbe-Alause

Published
2023
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5. A self-sustaining Single Photon Avalanche Diode Model.

Author

Sven Rink, V. Quenette, Jean-Robert Manouvrier, Andre Juge, Gilles Gouget, Denis Rideau, R. A. Bianchi, Dominique Golanski, Bastien Mamdy, Jean-Baptiste Kammerer, Wilfried Uhring, Christophe Lallement, Sara Pellegrini, Megan Agnew, and Bruce Rae

Published
2022
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6. A multi-site trial of an electronic health integrated physical activity promotion intervention in breast and endometrial cancers survivors: MyActivity study protocol

Author

Lisa Cadmus-Bertram, Payton Solk, Megan Agnew, Julia Starikovsky, Christian Schmidt, Whitney A. Morelli, Vanessa Hodgson, Hannah Freeman, Laura Muller, Abby Mishory, Sondra Naxi, Lillian Carden, Amye J. Tevaarwerk, Melanie Wolter, Emma Barber, Ryan Spencer, Mary E. Sesto, William Gradishar, Ronald Gangnon, Bonnie Spring, Inbal Nahum-Shani, and Siobhan M. Phillips

Subjects
Pharmacology (medical), General Medicine
Published
2023
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7. A Fokker-Planck-based Monte Carlo method for electronic transport and avalanche simulation in single-photon avalanche diodes

Author

Rémi Helleboid, Denis Rideau, Isobel Nicholson, Jeremy Grebot, Bastien Mamdy, Gabriel Mugny, Marie Basset, Megan Agnew, Dominique Golanski, Sara Pellegrini, Jérôme Saint-Martin, Marco Pala, Philippe Dollfus, STMicroelectronics [Crolles] (ST-CROLLES), Centre de Nanosciences et de Nanotechnologies (C2N), Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Commissariat à l'énergie atomique et aux énergies alternatives - Laboratoire d'Electronique et de Technologie de l'Information (CEA-LETI), Direction de Recherche Technologique (CEA) (DRT (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA), INL - Conception de Systèmes Hétérogènes (INL - CSH), Institut des Nanotechnologies de Lyon (INL), École Centrale de Lyon (ECL), Université de Lyon-Université de Lyon-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-École Supérieure de Chimie Physique Électronique de Lyon (CPE)-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS)-École Centrale de Lyon (ECL), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS), Université de Genève = University of Geneva (UNIGE), Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 (IEMN), Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-JUNIA (JUNIA), Université catholique de Lille (UCL)-Université catholique de Lille (UCL), and ANR-20-CE24-0004,GeSPAD,Diode à avalanche à photon unique en Germanium : de la caractérisation à la simulation avancée(2020)

Subjects
Advection-Diffusion Monte Carlo (ADMC), jitter, Acoustics and Ultrasonics, technology computed aided design (TCAD), Condensed Matter Physics, avalanche breakdown probability, Surfaces, Coatings and Films, Electronic, Optical and Magnetic Materials, electronic transport, [PHYS.COND.CM-MS]Physics [physics]/Condensed Matter [cond-mat]/Materials Science [cond-mat.mtrl-sci], drift-diffusion, electronic avalanche, [SPI.NANO]Engineering Sciences [physics]/Micro and nanotechnologies/Microelectronics, Fokker-Planck, singlephoton avalanche diode (SPAD), Monte Carlo simulation, [PHYS.COND.CM-MSQHE]Physics [physics]/Condensed Matter [cond-mat]/Mesoscopic Systems and Quantum Hall Effect [cond-mat.mes-hall]
Abstract

We present an efficient simulation method for electronic transport and avalanche in single-photon avalanche diodes (SPAD). Carrier transport is simulated in the real space using a particle Monte Carlo approach based on the Fokker–Planck point of view on an advection-diffusion equation, that enables us to reproduce mobility models, including electric fields and doping dependencies. The avalanche process is computed thanks to impact ionization rates implemented using a modified Random Path Length algorithm. Both transport and impact ionization mechanisms are computed concurrently from a statistical point of view, which allows us to achieve a full multi-particle simulation. This method provides accurate simulation of transport and avalanche process suitable for realistic three-dimensional SPADs, including all relevant stochastic aspects of these devices, together with a huge reduction of the computational time required, compared to standard Monte Carlo methods for charge carrier transport. The efficiency of our method empowers the possibility to precisely evaluate SPADs figures of merit and to explore new features that were untrackable by conventional methods. An extensive series of comparisons with experimental data on state-of-the art SPADs shows a very good accuracy of the proposed approach.

Published
2022
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