Dr. Nicholas F. Cothard Profile

Dr. Nicholas F. Cothard

NASA Postdoctoral Fellow at NASA Goddard Space Flight Ctr

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Author

Publications (20)

Proceedings Article | 31 August 2022 Poster + Paper

Cross-slot metal-mesh bandpass filters for far-infrared astronomy

Joanna Perido, Kevin Denis, Jason Glenn, Nicholas Cothard, Manuel Quijada, Jessica Patel, Edward Wollack, Tilak Hewagama, Sahid Aslam, Peter Day

Proceedings Volume 12190, 121901M (2022) https://doi.org/10.1117/12.2630571

KEYWORDS: Silicon, Gold, Terahertz radiation, Metals, Transmittance, Cryogenics, Antireflective coatings, Bandpass filters, Electromagnetic simulation, Far infrared, Astronomy, Planetary science

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Proceedings Article | 31 August 2022 Poster + Paper

CCAT-prime: the design and characterization of the silicon mirrors for the Fabry-Perot interferometer in the Epoch of reionization spectrometer

Bugao Zou, Steve Choi, Nicholas Cothard, Rodrigo Freundt, Zachary Huber, Yaqiong Li, Michael Niemack, Thomas Nikola, Dominik Riechers, Kayla Rossi, Gordon Stacey, Eve Vavagiakis

Proceedings Volume 12190, 121902B (2022) https://doi.org/10.1117/12.2629518

KEYWORDS: Silicon, Mirrors, Transmittance, Reflectivity, Semiconducting wafers, Etching, Dielectrics, Spectroscopy, Fabry–Perot interferometers, Fabry–Perot interferometry, Antireflective coatings, FSS based metamaterials

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Proceedings Article | 31 August 2022 Presentation + Paper

CCAT-prime: the epoch reionization spectrometer for primce-cam on FYST

Thomas Nikola, Steve Choi, Cody Duell, Rodrigo Freundt, Zachary Huber, Yaqiong Li, Kshama Malavalli, Mike Niemack, Kayla Rossi, Gordon Stacey, Eve Vavagiakis, Bugao Zou, Nicholas Cothard, Jason Austermann, Jordan Wheeler, Jiansong Gao, Michael Vissers, Johannes Hubmayr, James Beall, Joel Ullom

Proceedings Volume 12190, 121900G (2022) https://doi.org/10.1117/12.2629338

KEYWORDS: Fabry–Perot interferometers, Sensors, Mirrors, Detector arrays, Telescopes, Semiconducting wafers, Spectroscopy, Silicon, Optical filters, Finite element methods, Spectral resolution

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Proceedings Article | 29 August 2022 Poster

Parallel plate capacitor TiN KID array development for the Balloon Experiment for Galactic Infrared Science

Nicholas Cothard, Peter Day, Byeong Ho Eom, Jason Glenn, Henry LeDuc, Joanna Perido

Proceedings Volume PC12190, PC121901C (2022) https://doi.org/10.1117/12.2630408

KEYWORDS: Tin, Infrared radiation, Capacitors, Silicon, Sensors, Optical filters, Digital filtering, Titanium, Telescopes, Surface conduction electron emitter displays

Proceedings Article | 31 December 2020 Presentation + Paper

The integration and testing program for the Simons Observatory Large Aperture Telescope optics tubes

Kathleen Harrington, Carlos Sierra, Grace Chesmore, Shreya Sutariya, Aamir Ali, Steve Choi, Nicholas Cothard, Simon Dicker, Nicholas Galitzki, Shuay-Pwu Patty Ho, Anna Kofman, Brian Koopman, Jack Lashner, Jeff McMahon, Michael Niemack, John Orlowski-Scherer, Joseph Seibert, Max Silva-Feaver, Eve Vavagiakis, Zhilei Xu, Ningfeng Zhu

Proceedings Volume 11453, 1145318 (2020) https://doi.org/10.1117/12.2562647

KEYWORDS: Telescopes, Observatories, Integrated optics, Wafer-level optics, Sensors, Cryogenics, Optical fabrication, Microwave radiation, Bolometers, Receivers

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Proceedings Article | 15 December 2020 Poster + Paper

CCAT-prime: Designs and status of the first light 280 GHz MKID array and mod-cam receiver

Cody Duell, Eve Vavagiakis, Jason Austermann, Scott Chapman, Steve Choi, Nicholas Cothard, Brad Dober, Patricio Gallardo, Jiansong Gao, Christopher Groppi, Terry Herter, Gordon Stacey, Zachary Huber, Johannes Hubmayr, Doug Johnstone, Yaqiong Li, Philip Mauskopf, Jeff McMahon, Michael Niemack, Thomas Nikola, Kayla Rossi, Sara Simon, Adrian Sinclair, Michael Vissers, Jordan Wheeler, Bugao Zou

Proceedings Volume 11453, 114531F (2020) https://doi.org/10.1117/12.2562757

KEYWORDS: Sensors, Microwave radiation, Detector arrays, Telescopes, Galaxy groups and clusters, Inductance, Multiplexing

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Proceedings Article | 15 December 2020 Poster + Paper

Development of an optical detector testbed for the Simons Observatory

Joseph Seibert, Peter Ade, Aamir Ali, Kam Arnold, Nicholas Cothard, Nicholas Galitzki, Kathleen Harrington, Shuay-Pwu Patty Ho, Brian Keating, Lindsay Ng. Lowry, Megan Russell, Maximiliano Silva-Feaver, Praween Siritanasak, Grant Teply, Carole Tucker, Eve Vavagiakis, Zhilei Xu

Proceedings Volume 11453, 114532C (2020) https://doi.org/10.1117/12.2562045

KEYWORDS: Sensors, Observatories, Optical testing, Wafer-level optics, Telescopes, Cryogenics, Microwave radiation, Bolometers, Optical fabrication, Semiconducting wafers

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Proceedings Article | 14 December 2020 Presentation + Paper

Assembly development for the Simons Observatory focal plane readout module

Erin Healy, Aamir Ali, Kam Arnold, Jason Austermann, James Beall, Sarah Marie Bruno, Steve Choi, Jake Connors, Nicholas Cothard, Bradley Dober, Shannon Duff, Nicholas Galitzki, Gene Hilton, Shuay-Pwu Patty Ho, Johannes Hubmayr, Bradley Johnson, Yaqiong Li, Michael Link, Tammy Lucas, Heather McCarrick, Michael Niemack, Maximiliano Silva-Feaver, Rita Sonka, Suzanne Staggs, Eve Vavagiakis, Michael Vissers, Yuhan Wang, Edward Wollack, Zhilei Xu, Benjamin Westbrook, Kaiwen Zheng

Proceedings Volume 11453, 1145317 (2020) https://doi.org/10.1117/12.2561743

KEYWORDS: Observatories, Microwave radiation, Telescopes, Sensors, Bolometers, Multiplexing, Electronics, Receivers, Antennas, Transducers

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Proceedings Article | 14 December 2020 Presentation + Paper

The Simons Observatory: the Large Aperture Telescope Receiver (LATR) integration and validation results

Zhilei Xu, Tanay Bhandarkar, Gabriele Coppi, Anna Kofman, John Orlowski-Scherer, Ningfeng Zhu, Aamir Ali, Kam Arnold, Jason Austermann, Steve Choi, Jake Connors, Nicholas Cothard, Mark Devlin, Simon Dicker, Bradley Dober, Shannon Duff, Giulio Fabbian, Nicholas Galitzki, Saianeesh Haridas, Katheleen Harrington, Erin Healy, Shuay-Pwu Patty Ho, Johannes Hubmayr, Jeffrey Iuliano, Jack Lashner, Yaqiong Li, Michele Limon, Brian Koopman, Heather McCarrick, Jenna Moore, Federico Nati, Michael Niemack, Christian Reichardt, Karen Sarmiento, Joseph Seibert, Maximiliano Silva-Feaver, Rita Sonka, Suzanne Staggs, Robert Thornton, Eve Vavagiakis, Michael Vissers, Samantha Walker, Yuhan Wang, Edward Wollack, Kaiwen Zheng

Proceedings Volume 11453, 1145315 (2020) https://doi.org/10.1117/12.2576151

KEYWORDS: Observatories, Telescopes, Receivers, Tellurium, Cryogenics, Sensors, Optical instrument design, Optical alignment, Microwave radiation, Integrated optics

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Proceedings Article | 13 December 2020 Poster

Recent developments and optimization of commercially fabricated antenna-coupled transition edge sensor bolometer detectors for next generation cosmic microwave background polarimetry experiments

Aritoki Suzuki, Jason Stevens, Daniel Yohannes, Patrick Truitt, Michael Niemack, Eve Vavagiakis, Akito Kusaka, Yume Nishinomiya, Kenji Kiuchi, Logan Foote, Shawn Beckman, Adrian Lee, Ben Westbrook, Chris Raum, Trevor Sasse, John Vivalda, Mario Renzullo, Nicholas Cothard, Mayuri Sathyanarayana Rao

Proceedings Volume 11453, 1145324 (2020) https://doi.org/10.1117/12.2562378

KEYWORDS: Sensors, Polarimetry, Bolometers, Microwave radiation, Optical fabrication, Semiconducting wafers, Superconductors, Detector arrays, Wafer-level optics, Antennas

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Proceedings Article | 13 December 2020 Poster + Paper

Comparing complex impedance and bias step measurements of Simons Observatory transition edge sensors

Nicholas Cothard, Aamir Ali, Jason Austermann, Steve Choi, Kevin Crowley, Bradley Dober, Cody Duell, Shannon Duff, Patricio Gallardo, Gene Hilton, Shuay-Pwu Patty Ho, Johannes Hubmayr, Michael Link, Michael Niemack, Rita Sonka, Suzanne Staggs, Eve Vavagiakis, Edward Wollack, Zhilei Xu

Proceedings Volume 11453, 1145325 (2020) https://doi.org/10.1117/12.2575912

KEYWORDS: Sensors, Observatories, Bolometers, Thermal effects, Microwave radiation, Telescopes, Superconductors, Aluminum, Manganese, Calibration

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Proceedings Article | 15 August 2018 Paper

Far sidelobes from baffles and telescope support structures in the Atacama Cosmology Telescope

Patricio Gallardo, Nicholas Cothard, Roberto Puddu, Rolando Dünner, Brian Koopman, Michael Niemack, Sara Simon, Edward Wollack

Proceedings Volume 10708, 107082L (2018) https://doi.org/10.1117/12.2313005

KEYWORDS: Cameras, Telescopes, 3D modeling, Solid modeling, Ray tracing, Optical simulations, Optical testing

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Proceedings Article | 6 August 2018 Paper

Systematic uncertainties in the Simons Observatory: optical effects and sensitivity considerations

Patricio Gallardo, Jon Gudmundsson, Brian Koopman, Frederick Matsuda, Sara Simon, Aamir Ali, Sean Bryan, Yuji Chinone, Gabriele Coppi, Nicholas Cothard, Mark Devlin, Simon Dicker, Giulio Fabbian, Nicholas Galitzki, Charles Hill, Brian Keating, Akito Kusaka, Jacob Lashner, Adrian Lee , Michele Limon, Philip Mauskopf , Jeff McMahon, Federico Nati , Michael Niemack, John Orlowski-Scherer, Stephen Parshley , Giuseppe Puglisi, Christian Reichardt , Maria Salatino, Suzanne Staggs, Aritoki Suzuki, Eve Vavagiakis, Edward Wollack, Zhilei Xu, Ningfeng Zhu

Proceedings Volume 10708, 107083Y (2018) https://doi.org/10.1117/12.2312971

KEYWORDS: Telescopes, Polarization, Physics, Cameras, Optical simulations, Reflectors, Reflectivity, Sensors, Geometrical optics, Optical components

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Proceedings Article | 24 July 2018 Presentation + Paper

Performance of the advanced ACTPol low frequency array

Yaqiong Li, Jason Austermann, James Beall, Sarah Marie Bruno, Steve Choi, Nicholas Cothard, Kevin Crowley, Shannon Duff, Patricio Gallardo, Shawn Henderson, Shuay-Pwu Patty Ho, Johannes Hubmayr, Brian Koopman, Jeff McMahon, Michael Niemack, Maria Salatino, Sara Simon, Suzanne Staggs, Jason Stevens, Joel Ullom, Jonathan Ward, Edward Wollack

Proceedings Volume 10708, 107080A (2018) https://doi.org/10.1117/12.2313942

KEYWORDS: Sensors, Semiconducting wafers, Bolometers, Silicon, Detector arrays, Polarization, Superconductors, Optical testing

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Proceedings Article | 10 July 2018 Paper

Optimizing the efficiency of Fabry-Perot interferometers with silicon-substrate mirrors

Nicholas Cothard, Mahiro Abe, Thomas Nikola, Gordon Stacey, German Cortes-Medellin, Patricio Gallardo, Brian Koopman, Michael Niemack, Stephen Parshley, Eve Vavagiakis, Kenny Vetter

Proceedings Volume 10706, 107065B (2018) https://doi.org/10.1117/12.2313483

KEYWORDS: Silicon, Metals, Mirrors, Etching, Metamaterials, Gold, Reflectivity, Semiconducting wafers, Transmittance, Deep reactive ion etching

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Proceedings Article | 9 July 2018 Presentation + Paper

CCAT-Prime: science with an ultra-widefield submillimeter observatory on Cerro Chajnantor

G. Stacey, M. Aravena, K. Basu, N. Battaglia, B. Beringue, F. Bertoldi, J. R. Bond, P. Breysse, R. Bustos, S. Chapman, D. Chung, N. Cothard, J. Erler, M. Fich, S. Foreman, P. Gallardo, R. Giovanelli, U. Graf, M. Haynes, R. Herrera-Camus, T. Herter, R. Hložek, D. Johnstone, L. Keating, B. Magnelli, D. Meerburg, J. Meyers, N. Murray, M. Niemack, T. Nikola, M. Nolta, S. Parshley, D. Riechers, P. Schilke, D. Scott, G. Stein, J. Stevens, J. Stutzki, E. Vavagiakis, M. Viero

Proceedings Volume 10700, 107001M (2018) https://doi.org/10.1117/12.2314031

KEYWORDS: Galactic astronomy, Stars, Telescopes, Spectroscopy, Carbon monoxide, Cameras, Polarization, Astronomy, Bolometers

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Proceedings Article | 9 July 2018 Presentation + Paper

Prime-Cam: a first-light instrument for the CCAT-prime telescope

E. Vavagiakis, Z. Ahmed, A. Ali, K. Basu, N. Battaglia, F. Bertoldi, R. Bond, R. Bustos, S. Chapman, D. Chung, G. Coppi, N. Cothard, S. Dicker, C. Duell, S. Duff, J. Erler, M. Fich, N. Galitzki, P. Gallardo, S. Henderson, T. Herter, G. Hilton, J. Hubmayr, K. Irwin, B. Koopman, J. McMahon, N. Murray, M. Niemack, T. Nikola, M. Nolta, J. Orlowski-Scherer, S. Parshley, D. Riechers, K. Rossi, D. Scott, C. Sierra, M. Silva-Feaver, S. Simon, G. Stacey, J. Stevens, J. Ullom, M. Vissers, S. Walker, E. Wollack, Z. Xu, N. Zhu

Proceedings Volume 10708, 107081U (2018) https://doi.org/10.1117/12.2313868

KEYWORDS: Sensors, Telescopes, Spectroscopy, Receivers, Detector arrays, Silicon, Cryogenics, Polarization, Electronics, Physics

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Proceedings Article | 6 July 2018 Paper

CCAT-prime: a novel telescope for sub-millimeter astronomy

Stephen Parshley, Jörg Kronshage, James Blair, Terry Herter, Mike Nolta, Gordon Stacey, Andrew Bazarko, Frank Bertoldi, Ricardo Bustos, Donald Campbell, Scott Chapman, Nicolas Cothard, Mark Devlin, Jens Erler, Michel Fich, Patricio Gallardo, Riccardo Giovanelli, Urs Graf, Scott Gramke, Martha Haynes, Richard Hills, Michele Limon, Jeffrey Mangum, Jeff McMahon, Michael Niemack, Thomas Nikola, Markus Omlor, Dominik Riechers, Karl Steeger, Jürgen Stutzki, Eve Vavagiakis

Proceedings Volume 10700, 107005X (2018) https://doi.org/10.1117/12.2314046

KEYWORDS: Telescopes, Mirrors, Optical instrument design, Device simulation, Observatories, Astronomical telescopes, Radio telescopes, Reflector telescopes, Mirror structures, Structural design

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Proceedings Article | 7 March 2017 Paper

Highly uniform 150 mm diameter multichroic polarimeter array deployed for CMB detection

Shuay-Pwu Patty Ho, Jason Austermann, James Beall, Steve Choi, Nicholas Cothard, Kevin Crowley, Rahul Datta, Mark Devlin, Shannon Duff, Patricio Gallardo, Matthew Hasselfield, Shawn Henderson, Gene Hilton, Johannes Hubmayr, Brian Koopman, Yaqiong Li, Jeffrey McMahon, Michael Niemack, Maria Salatino, Sara Simon, Suzanne Staggs, Jonathan Ward, Joel Ullom, Eve Vavagiakis, Edward Wollack

Proceedings Volume 9914, 991418 (2017) https://doi.org/10.1117/12.2233113

KEYWORDS: Sensors, Telescopes, Receivers, Microwave radiation, Polarimetry, Bolometers, Polarization, Detector arrays, Anisotropy, Superconducting detectors

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Proceedings Article | 19 July 2016 Paper

Readout of two-kilopixel transition-edge sensor arrays for Advanced ACTPol

Shawn Henderson, Jason Stevens, Mandana Amiri, Jason Austermann, James Beall, Saptarshi Chaudhuri, Hsiao-Mei Cho, Steve Choi, Nicholas Cothard, Kevin Crowley, Shannon Duff, Colin Fitzgerald, Patricio Gallardo, Mark Halpern, Matthew Hasselfield, Gene Hilton, Shuay-Pwu Patty Ho, Johannes Hubmayr, Kent Irwin, Brian Koopman, Dale Li, Yaqiong Li, Jeff McMahon, Federico Nati, Michael Niemack, Carl Reintsema, Maria Salatino, Alessandro Schillaci, Benjamin Schmitt, Sara Simon, Suzanne Staggs, Eve Vavagiakis, Jonathan Ward

Proceedings Volume 9914, 99141G (2016) https://doi.org/10.1117/12.2233895

KEYWORDS: Multiplexing, Electronics, Sensors, Multiplexing, Electronics, Superconductors, Inductance, Polarization, Multiplexers, Interfaces, Tellurium, Servomechanisms

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Showing 5 of 20 publications

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