Mr. Jianyang Fu Profile

Jianyang Fu

at Univ. of Illinois

SPIE Involvement:

Author

Publications (6)

Proceedings Article | 31 August 2022 Poster + Paper

Design and testing of kinetic inductance detector package for the terahertz intensity mapper

L.-J. Liu, R. Janssen, C. Bradford, S. Hailey-Dunsheath, J. Filippini, J. Aguirre, J. Bracks, A. Corso, J. Fu, C. Groppi, J. Hoh, R. Keenan, I. Lowe, D. Marrone, P. Mauskopf, R. Nie, J. Redford, I. Trumper, J. Vieira

Proceedings Volume 12190, 121902F (2022) https://doi.org/10.1117/12.2629675

KEYWORDS: Galaxy evolution, Astronomy, Far infrared, Terahertz spectroscopy, Magnetism, Sensors, Aluminum, Semiconducting wafers, Stars, Magnetic sensors, Inductance, Prototyping, Galactic astronomy, Resonators

Read Abstract +

The Terahertz Intensity Mapper (TIM) is designed to probe the star formation history in dust-obscured star-forming galaxies around the peak of cosmic star formation. This will be done via measurements of the redshifted 157.7 µm line of singly ionized carbon ([CII]). TIM employs two R~250 long-slit grating spectrometers covering 240 to 420 µm. Each is equipped with a focal plane unit containing four wafer-sized subarrays of horn-coupled aluminum kinetic inductance detectors (KIDs). We present the design and performance of a prototype focal plane assembly for one of TIM’s KID-based subarrays. The overall detector package must satisfy thermal and mechanical requirements, while maintaining high optical efficiency and a suitable electromagnetic environment for the KIDs. In particular, our design manages to strictly maintain a 50 µm air gap between the array and the horn block. The prototype detector housing in combination with the first flight-like quadrant were tested at 250 mK. A frequency scan using a vector network analyzer shows 823 resonance features, which represents ⪆90% yield, indicating a good performance of our TIM detector wafer and the whole focal plane unit. Initial measurements also showed that many resonances were affected by collisions and/or very shallow transmission dips as a result of a degraded internal quality factor. This is attributed to the presence of an external magnetic field during cooldown. We report on a study of magnetic field dependence of the quality factor of our quadrant array. We implemented a Helmholtz coil to vary the magnetic field at the detectors by (partially) nulling earth’s. Our investigation shows that the earth magnetic field can significantly affect our KIDs’ performance by degrading the quality factor by a factor of two to five, well below those expected from the operational temperature or optical loading. We find that we can sufficiently recover our detectors’ quality factor by tuning the current in the coils to generate a field that matches earth’s magnetic field in magnitude to within a few µT. We emphasize that it is impractical to fly a Helmholtz coil on TIM and dynamically “null” earth’s. Therefore, it is necessary to employ a properly designed magnetic shield enclosing the TIM focal plane unit. Based on the results presented in this paper, we set a shielding requirement of |B| ⪅3 µT.

Proceedings Article | 31 August 2022 Presentation + Paper

The terahertz intensity mapper: a balloon-borne imaging spectrometer for galaxy evolution

Daniel Marrone, James Aguirre, Justin Bracks, Charles Bradford, Brockton Brendal, Bruce Bumble, Anthony Corso, Mark Devlin, Nick Emerson, Jeffrey Filippini, Jianyang Fu, Victor Gasho, Christopher Groppi, Steve Hailey-Dunsheath, Jonathan Hoh, Matthew Hollister, Reinier M. Janssen, Dylan Joralmon, Ryan Keenan, Lun-Jun Liu, Ian Lowe, Philip Mauskopf, Evan Mayer, Rong Nie, Vesal Razavimaleki, Joseph Redford, Talia Saeid, Isaac Trumper, Joaquin Vieira

Proceedings Volume 12190, 1219008 (2022) https://doi.org/10.1117/12.2630644

KEYWORDS: Telescopes, Spectroscopy, Mirrors, Sensors, Cryogenics

Read Abstract +

Proceedings Article | 26 August 2022 Presentation

Kinetic inductance detectors for the Terahertz Intensity Mapper balloon mission: optical sensitivity and performance of kilopixel arrays.

Reinier M. J. Janssen, Rong Nie, Bruce Bumble, Lun-Jun Liu, Joseph Redford, Jeffrey Filippini, Charles Bradford, Steve Hailey-Dunsheath, James Aguirre, Justin Bracks, Anthony Corso, Jianyang Fu, Christopher Groppi, Jonathan Hoh, Ryan Keenan, Ian Lowe, Daniel Marrone, Philip Mauskopf, Isaac Trumper, Joaquin Vieira

Proceedings Volume PC12190, PC121900Q (2022) https://doi.org/10.1117/12.2630516

KEYWORDS: Sensors, Inductance, Spectrometers, Photodetectors, Staring arrays, Spectral resolution, Quasiparticles, Optical testing, Capacitors

Read Abstract +

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

Read Abstract +

Proceedings Article | 13 December 2020 Poster + Presentation

Terahertz intensity mapper focal plane and array design

Reinier M. Janssen, Lunjun Liu, Rong Nie, Jianyang Fu, Isaac Trumper, Steve Hailey-Dunsheath, Charles Bradford, Jeffrey Filippini

Proceedings Volume 11453, 114531N (2020) https://doi.org/10.1117/12.2560705

KEYWORDS: Inductance, Detector arrays, Spectrometers, Aluminum, Absorption, Semiconducting wafers, Spectroscopy, Telescopes, Prototyping, Superconductors

Read Abstract +

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

Read Abstract +

Showing 5 of 6 publications

View contact details

UPDATE YOUR PROFILE

Is this your profile? Update it now.

Sign into your SPIE.org account

Don’t have a profile and want one?

Create an account on SPIE.org

Keywords/Phrases

Search In:

Publication Years