Dr. Zhaodi Pan Profile

Dr. Zhaodi Pan

Maria Goeppert Mayer Fellow

SPIE Involvement:

Author

Publications (11)

Proceedings Article | 31 August 2022 Presentation + Paper

SPT-3G+: mapping the high-frequency cosmic microwave background using kinetic inductance detectors

A. Anderson, P. Barry, A. Bender, B. Benson, L. Bleem, J. Carlstrom, T. Cecil, C. Chang, T. Crawford, K. Dibert, M. Dobbs, K. Fichman, N. Halverson, W. Holzapfel, A. Hryciuk, K. Karkare, J. Li, M. Lisovenko, D. Marrone, J. McMahon, J. Montgomery, T. Natoli, Z. Pan, S. Raghunathan, C. Reichardt, M. Rouble, E. Shirokoff, G. Smecher, A. Stark, J. Vieira, M. Young

Proceedings Volume 12190, 1219003 (2022) https://doi.org/10.1117/12.2629755

KEYWORDS: Sensors, Telescopes, Spectrometers, Physics, Rayleigh scattering, Microwave radiation, Cameras, Remote sensing, Silicon, Signal to noise ratio

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Proceedings Article | 26 August 2022 Presentation

MKID array development for the SPT-3G+ focal plane

Karia Dibert, Peter Barry, Adam Anderson, Bradford Benson, Tom Cecil, Clarence Chang, Juliang Li, Zhaodi Pan, Maclean Rouble

Proceedings Volume PC12190, PC121900P (2022) https://doi.org/10.1117/12.2629416

KEYWORDS: Staring arrays, Sensors, Microwave radiation, Cameras, Telescopes, Resonators, Receivers, Rayleigh scattering, Prototyping, Optical instrument design

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SPIE Journal Paper | 8 January 2022

Performance and characterization of the SPT-3G digital frequency-domain multiplexed readout system using an improved noise and crosstalk model

Joshua Montgomery, Peter A. Ade, Zeeshan Ahmed, Ethan Anderes, Adam Anderson, Melanie Archipley, Jessica Avva, Kevin Aylor, Lennart Balkenhol, Peter Barry, Ritoban Thakur, Karim Benabed, Amy Bender, Bradford Benson, Federico Bianchini, Lindsey Bleem, Francois Bouchet, Lincoln Bryant, Karen Byrum, John Carlstrom, Faustin Carter, Thomas Cecil, Clarence Chang, Prakrut Chaubal, Geoffrey Chen, Hsiao-Mei Cho, Ti-Lin Chou, Jean-Francois Cliche, Tom Crawford, Ari Cukierman, Cali Daley, Tijmen de Haan, Edward Denison, Karia Dibert, Junjia Ding, Matthew Adam Dobbs, Daniel Dutcher, Tucker Elleflot, Wendeline Everett, Cahng Feng, Kyle R. Ferguson, Allen Foster, Jianyang Fu, Silvia Galli, Anne Gambrel, Robert Gardner, Neil Goeckner-Wald, John Groh, Riccardo Gualtieri, Sam Guns, Nikhel Gupta, Robert Guyser, Nils Halverson, Angelina Harke-Hosemann, Nicholas Harrington, Jason Henning, Gene Hilton, Eric Hivon, William Holzapfel, John Hood, Doug Howe, Nicholas Huang, Kent Irwin, Oliver Jeong, Michelle Jonas, Adam Jones, Trupti Khaire, Lloyd Knox, Anna Kofman, Milo Korman, Donna Kubik, Stephen Kuhlmann, Chao-Lin Kuo, Adrian Lee, Erik Leitch, Amy Lowitz, Chunyu Lu, Stephan Meyer, Daniel Michalik, Marius Millea, Andrew Nadolski, Tyler Natoli, Hogan Nguyen, Gavin Noble, Valentine Novosad, Yuuki Omori, Steve Padin, Zhaodi Pan, Pascal Paschos, John Pearson, Chrystian Posada, Karthik Prabhu, Wei Quan, Alexandra Rahlin, Christian Reichardt, David Riebel, Benedikt Riedel, Maclean Rouble, John Ruhl, James Sayre, Eduardo Schiappucci, Erik Shirokoff, Graeme Smecher, Joshua Sobrin, Antony Stark, Judith Stephen, Kyle Story, Aritoki Suzuki, Keith Thompson, Ben Thorne, Carole Tucker, Caterina Umilta, Leila Vale, Keith Vanderlinde, Joaquin Vieira, Gensheng Wang, Nathan Whitehorn, Wai Ling Wu, Volodymyr Yefremenko, Ki Won Yoon, Matthew Young

JATIS, Vol. 8, Issue 01, 014001, (January 2022) https://doi.org/10.1117/12.10.1117/1.JATIS.8.1.014001

KEYWORDS: Sensors, Multiplexing, Cryogenics, Interference (communication), Resistance, Physics, Systems modeling, Receivers, Performance modeling, Nulling interferometry

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Proceedings Article | 13 December 2020 Paper

Performance and characterization of the SPT-3G digital frequency multiplexed readout system using an improved noise and crosstalk model

J. Montgomery, A. Anderson, J. Avva, A. Bender, M. Dobbs, D. Dutcher, T. Elleflot, A. Foster, J. Groh, W. Holzapfel, D. Howe, N. Huang, A. Lowitz, G. Noble, Z. Pan, A. Rahlin, D. Riebel, G. Smecher, A. Suzuki, N. Whitehorn

Proceedings Volume 11453, 114530X (2020) https://doi.org/10.1117/12.2561537

KEYWORDS: Performance modeling, Multiplexing, Sensors, Cryogenics, Bolometers, Telescopes, Receivers, Superconductors, Microwave radiation, Microwave photonics

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Proceedings Article | 24 August 2018 Presentation + Paper

Design and characterization of the SPT-3G receiver

J. Sobrin, P. A. Ade, Z. Ahmed, A. Anderson, J. Avva, R. Basu Thakur, A. Bender, B. Benson, J. Carlstrom, F. Carter, T. Cecil, C. Chang, J. F. Cliche, A. Cukierman, T. de Haan, J. Ding, M. A. Dobbs, D. Dutcher, W. Everett, A. Foster, J. Gallichio, A. Gilbert, J. Groh, S. Guns, N. Halverson, A. Harke-Hosemann, N. Harrington, J. Henning, W. Holzapfel, N. Huang, K. Irwin, O. Jeong, M. Jonas, T. Khaire, A. Kofman, M. Korman, D. Kubik, S. Kuhlmann, C. L. Kuo, A. Lee, A. Lowitz, S. Meyer, D. Michalik, J. Montgomery, A. Nadolski, T. Natoli, H. Nguyen, G. Noble, V. Novosad, S. Padin, Z. Pan, J. Pearson, C. Posada, W. Quan, A. Rahlin, J. Ruhl, J. Sayre, E. Shirokoff, G. Smecher, A. Stark, K. Story, A. Suzuki, K. Thompson, C. Tucker, K. Vanderlinde, J. Vieira, G. Wang, N. Whitehorn, V. Yefremenko, K. W. Yoon, M. Young

Proceedings Volume 10708, 107081H (2018) https://doi.org/10.1117/12.2314366

KEYWORDS: Sensors, Receivers, Cryogenics, Physics, Thermography, Telescopes, Detector arrays, Lenses, Copper, Astronomy

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Proceedings Article | 1 August 2018 Paper

Year two instrument status of the SPT-3G cosmic microwave background receiver

A. Bender, P. A. Ade, Z. Ahmed, A. Anderson, J. Avva, K. Aylor, P. Barry, R. Basu Thakur, B. Benson, L. Bleem, S. Bocquet, K. Byrum, J. Carlstrom, F. Carter, T. Cecil, C. Chang, H.-M. Cho, J. F. Cliche, T. Crawford, A. Cukierman, T. de Haan, E. Denison, J. Ding, M. A. Dobbs, S. Dodelson, D. Dutcher, W. Everett, A. Foster, J. Gallicchio, A. Gilbert, J. Groh, S. Guns, N. Halverson, A. Harke-Hosemann, N. Harrington, J. Henning, G. Hilton, G. Holder, W. Holzapfel, N. Huang, K. Irwin, O. Jeong, M. Jonas, A. Jones, T. Khaire, L. Knox, A. Kofman, M. Korman, D. Kubik, S. Kuhlmann, C.-L. Kuo, A. Lee, E. Leitch, A. Lowitz, S. Meyer, D. Michalik, J. Montgomery, A. Nadolski, T. Natoli, H. Ngyuen, G. Noble, V. Novosad, S. Padin, Z. Pan, J. Pearson, C. Posada, W. Quan, S. Raghunathan, A. Rahlin, C. Reichardt, J. Ruhl, J. Sayre, E. Shirokoff, G. Smecher, J. Sobrin, A. Stark, K. Story, A. Suzuki, K. Thompson, C. Tucker, L. Vale, K. Vanderlinde, J. Vieira, G. Wang, N. Whitehorn, W. L. Wu, V. Yefremenko, K. W. Yoon, M. Young

Proceedings Volume 10708, 1070803 (2018) https://doi.org/10.1117/12.2312426

KEYWORDS: Sensors, Receivers, Physics, Polarization, Microwave radiation, Bolometers, Telescopes, Astronomy, Electronics, Semiconducting wafers

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Proceedings Article | 31 July 2018 Paper

Characterization and performance of the second-year SPT-3G focal plane

D. Dutcher, P. A. Ade, Z. Ahmed, A. Anderson, J. Avva, R. Basu Thakur, A. Bender, B. Benson, J. Carlstrom, F. Carter, T. Cecil, C. Chang, J. Cliche, A. Cukierman, T. de Haan, J. Ding, M. Dobbs, W. Everett, A. Foster, J. Gallicchio, A. Gilbert, J. Groh, A. Harke-Hosemann, S. Guns, N. Halverson, N. Harrington, J. Henning, W. Holzapfel, N. Huang, K. Irwin, O. Jeong, M. Jonas, T. Khaire, A. Kofman, M. Korman, D. Kubik, S. Kuhlmann, C.-L. Kuo, A. Lowitz, A. Lee, S. Meyer, D. Michalik, J. Montgomery, A. Nadolski, T. Natoli, H. Nguyen, G. Noble, V. Novosad, S. Padin, Z. Pan, J. Pearson, C. Posada, W. Quan, A. Rahlin, J. Ruhl, J. Sayre, E. Shirokoff, G. Smecher, J. Sobrin, A. Stark, K. Story, A. Suzuki, K. Thompson, C. Tucker, K. Vanderlinde, J. Vieira, G. Wang, N. Whitehorn, V. Yefremenko, K. W. Yoon, M. Young

Proceedings Volume 10708, 107081Z (2018) https://doi.org/10.1117/12.2312451

KEYWORDS: Sensors, Bolometers, Semiconducting wafers, Telescopes, Resistance, Physics, Wafer-level optics, Polarization, Astronomy, Superconductors

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Proceedings Article | 9 July 2018 Paper

Broadband anti-reflective coatings for cosmic microwave background experiments

A. Nadolski, A. Kofman, J. Vieira, P. A. Ade, Z. Ahmed, A. Anderson, J. Avva, R. Basu Thakur, A. Bender, B. Benson, J. Carlstrom, F. Carter, T. Cecil, C. Chang, J. F. Cliche, A. Cukierman, T. de Haan, J. Ding, M. A. Dobbs, D. Dutcher, W. Everett, A. Foster, J. Fu, J. Gallichio, A. Gilbert, J. Groh, S. Guns, R. Guyser, N. Halverson, A. Harke-Hosemann, N. Harrington, J. Henning, W. Holzapfel, N. Huang, K. Irwin, O. Jeong, M. Jonas, A. Jones, T. Khaire, M. Korman, D. Kubik, S. Kuhlmann, C.-L. Kuo, A. Lee, A. Lowitz, S. Meyer, D. Michalik, J. Montgomery, T. Natoli, H. Nguyen, G. Noble, V. Novosad, S. Padin, Z. Pan, J. Pearson, C. Posada, W. Quan, A. Rahlin, J. Ruhl, J. Sayre, E. Shirokoff, G. Smecher, J. Sobrin, A. Stark, K. Story, A. Suzuki, K. Thompson, C. Tucker, K. Vanderlinde, G. Wang, N. Whitehorn, V. Yefremenko, K. W. Yoon, M. Young

Proceedings Volume 10708, 1070843 (2018) https://doi.org/10.1117/12.2315674

KEYWORDS: Coating, Antireflective coatings, Refractive index, Sensors, Physics, Lenses, Optical components

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Proceedings Article | 20 July 2016 Paper

Integrated performance of a frequency domain multiplexing readout in the SPT-3G receiver

A. Bender, P. A. Ade, A. Anderson, J. Avva, Z. Ahmed, K. Arnold, J. Austermann, R. Basu Thakur, B. Benson, L. Bleem, K. Byrum, J. Carlstrom, F. Carter, C. Chang, H. M. Cho, J. F. Cliche, T. Crawford, A. Cukierman, D. Czaplewski, J. Ding, R. Divan, T. de Haan, M. A. Dobbs, D. Dutcher, W. Everett, A. Gilbert, J. Groh, R. Guyser, N. Halverson, A. Harke-Hosemann, N. Harrington, K. Hattori, J. Henning, G. Hilton, W. Holzapfel, N. Huang, K. Irwin, O. Jeong, T. Khaire, M. Korman, D. Kubik, C. L. Kuo, A. Lee, E. Leitch, S. Lendinez, S. Meyer, C. Miller, J. Montgomery, A. Nadolski, T. Natoli, H. Nguyen, V. Novosad, S. Padin, Z. Pan, J. Pearson, C. Posada, A. Rahlin, C. Reichardt, J. Ruhl, B. Saliwanchik, J. Sayre, J. Shariff, Ian Shirley, E. Shirokoff, G. Smecher, J. Sobrin, L. Stan, A. Stark, K. Story, A. Suzuki, Q. Y. Tang, K. Thompson, C. Tucker, K. Vanderlinde, J. Vieira, G. Wang, N. Whitehorn, V. Yefremenko, K. W. Yoon

Proceedings Volume 9914, 99141D (2016) https://doi.org/10.1117/12.2232146

KEYWORDS: Receivers, Bolometers, Multiplexing, Sensors, Electronics, Cryogenics, Resistance, Superconductors, Physics, Filtering (signal processing)

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Proceedings Article | 19 July 2016 Paper

Large arrays of dual-polarized multichroic TES detectors for CMB measurements with the SPT-3G receiver

Chrystian Posada, Peter A. Ade, Adam Anderson, Jessica Avva, Zeeshan Ahmed, Kam Arnold, Jason Austermann, Amy Bender, Bradford Benson, Lindsey Bleem, Karen Byrum, John Carlstrom, Faustin Carter, Clarence Chang, Hsiao-Mei Cho, Ari Cukierman, David Czaplewski, Junjia Ding, Ralu Divan, Tijmen de Haan, Matt Dobbs, Daniel Dutcher, Wenderline Everett, Renae Gannon, Robert Guyser, Nils Halverson, Nicholas Harrington, Kaori Hattori, Jason Henning, Gene Hilton, William Holzapfel, Nicholas Huang, Kent Irwin, Oliver Jeong, Trupti Khaire, Milo Korman, Donna Kubik, Chao-Lin Kuo, Adrian Lee, Erik Leitch, Sergi Lendinez Escudero, Stephan Meyer, Christina Miller, Joshua Montgomery, Andrew Nadolski, Tyler Natoli, Hogan Nguyen, Valentyn Novosad, Stephen Padin, Zhaodi Pan, John Pearson, Alexandra Rahlin, Christian Reichardt, John Ruhl, Benjamin Saliwanchik, Ian Shirley, James Sayre, Jamil Shariff, Erik Shirokoff, Liliana Stan, Antony Stark, Joshua Sobrin, Kyle Story, Aritoki Suzuki, Qing Yang Tang, Ritoban Thakur, Keith Thompson, Carole Tucker, Keith Vanderlinde, Joaquin Vieira, Gensheng Wang, Nathan Whitehorn, Volodymyr Yefremenko, Ki Won Yoon

Proceedings Volume 9914, 991417 (2016) https://doi.org/10.1117/12.2232912

KEYWORDS: Sensors, Receivers, Bolometers, Physics, Niobium, Technetium, Semiconducting wafers, Silicon, Antennas, Detector arrays

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Detectors for cosmic microwave background (CMB) experiments are now essentially background limited, so a straightforward alternative to improve sensitivity is to increase the number of detectors. Large arrays of multichroic pixels constitute an economical approach to increasing the number of detectors within a given focal plane area. Here, we present the fabrication of large arrays of dual-polarized multichroic transition-edge-sensor (TES) bolometers for the South Pole Telescope third-generation CMB receiver (SPT-3G). The complete SPT-3G receiver will have 2690 pixels, each with six detectors, allowing for individual measurement of three spectral bands (centered at 95 GHz, 150 GHz and 220 GHz) in two orthogonal polarizations. In total, the SPT-3G focal plane will have 16140 detectors. Each pixel is comprised of a broad-band sinuous antenna coupled to a niobium microstrip transmission line. In-line filters are used to define the different band-passes before the millimeter-wavelength signal is fed to the respective Ti/Au TES sensors. Detectors are read out using a 64x frequency domain multiplexing (fMux) scheme. The microfabrication of the SPT-3G detector arrays involves a total of 18 processes, including 13 lithography steps. Together with the fabrication process, the effect of processing on the Ti/Au TES’s Tc is discussed. In addition, detectors fabricated with Ti/Au TES films with Tc between 400 mK 560 mK are presented and their thermal characteristics are evaluated. Optical characterization of the arrays is presented as well, indicating that the response of the detectors is in good agreement with the design values for all three spectral bands (95 GHz, 150 GHz, and 220 GHz). The measured optical efficiency of the detectors is between 0.3 and 0.8. Results discussed here are extracted from a batch of research of development wafers used to develop the baseline process for the fabrication of the arrays of detectors to be deployed with the SPT-3G receiver. Results from these research and development wafers have been incorporated into the fabrication process to get the baseline fabrication process presented here. SPT-3G is scheduled to deploy to the South Pole Telescope in late 2016.

Proceedings Article | 23 July 2014 Paper

SPT-3G: a next-generation cosmic microwave background polarization experiment on the South Pole telescope

B. Benson, P. A. Ade, Z. Ahmed, S. Allen, K. Arnold, J. Austermann, A. Bender, L. Bleem, J. Carlstrom, C. Chang, H. Cho, J. Cliche, T. Crawford, A. Cukierman, T. de Haan, M. Dobbs, D. Dutcher, W. Everett, A. Gilbert, N. Halverson, D. Hanson, N. Harrington, K. Hattori, J. Henning, G. Hilton, G. Holder, W. Holzapfel, K. Irwin, R. Keisler, L. Knox, D. Kubik, C. Kuo, A. Lee, E. Leitch, D. Li, M. McDonald, S. Meyer, J. Montgomery, M. Myers, T. Natoli, H. Nguyen, V. Novosad, S. Padin, Z. Pan, J. Pearson, C. Reichardt, J. Ruhl, B. Saliwanchik, G. Simard, G. Smecher, J. Sayre, E. Shirokoff, A. Stark, K. Story, A. Suzuki, K. Thompson, C. Tucker, K. Vanderlinde, J. Vieira, A. Vikhlinin, G. Wang, V. Yefremenko, K. Yoon

Proceedings Volume 9153, 91531P (2014) https://doi.org/10.1117/12.2057305

KEYWORDS: Polarization, Sensors, Telescopes, Physics, Receivers, Galaxy groups and clusters, Antennas, Signal detection, Signal to noise ratio, Bolometers

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