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Journal of Low Temperature Physics

, Volume 193, Issue 3–4, pp 408–414 | Cite as

SuperSpec, The On-Chip Spectrometer: Improved NEP and Antenna Performance

  • Jordan Wheeler
  • S. Hailey-Dunsheath
  • E. Shirokoff
  • P. S. Barry
  • C. M. Bradford
  • S. Chapman
  • G. Che
  • S. Doyle
  • J. Glenn
  • S. Gordon
  • M. Hollister
  • A. Kovács
  • H. G. LeDuc
  • P. Mauskopf
  • R. McGeehan
  • C. McKenney
  • T. Reck
  • J. Redford
  • C. Ross
  • C. Shiu
  • C. Tucker
  • J. Turner
  • S. Walker
  • J. Zmuidzinas
Article

Abstract

SuperSpec is a new technology for mm and sub-mm spectroscopy. It is an on-chip spectrometer being developed for multi-object, moderate-resolution (\(R\sim 300\)), large bandwidth survey spectroscopy of high-redshift galaxies for the 1 mm atmospheric window. This band accesses the CO ladder in the redshift range of \(z =\) 0–4 and the [CII] 158 \(\upmu \)m line from redshift \(z =\)  5–9. SuperSpec employs a novel architecture in which detectors are coupled to a series of resonant filters along a single microwave feedline instead of using dispersive optics. This construction allows for the creation of a full spectrometer occupying only \(\sim 10\,\hbox {cm}^2\) of silicon, a reduction in size of several orders of magnitude when compared to standard grating spectrometers. This small profile enables the production of future multi-beam spectroscopic instruments envisioned for the millimeter band to measure the redshifts of dusty galaxies efficiently. The SuperSpec collaboration is currently pushing toward the deployment of a SuperSpec demonstration instrument in fall of 2018. The progress with the latest SuperSpec prototype devices is presented; reporting increased responsivity via a reduced inductor volume (2.6 \(\upmu \hbox {m}^3\)) and the incorporation of a new broadband antenna. A detector NEP of 3–4 \(\times 10^{-18}\) W/Hz\(^{0.5}\) is obtained, sufficient for background-limited observation on mountaintop sites. In addition, beam maps and efficiency measurements of a new wide-band dual bow-tie slot antenna are shown.

Keywords

Spectrometer Kinetic inductance detectors NEP Bow tie Antenna mm-wave 

Notes

Acknowledgements

This work is supported in part by NASA Space Technology Research Fellowship NSTRF NNX15AQ09H and NSF AST ATI Grant 1407457.

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Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2018

Authors and Affiliations

  • Jordan Wheeler
    • 1
  • S. Hailey-Dunsheath
    • 2
  • E. Shirokoff
    • 3
  • P. S. Barry
    • 3
    • 4
  • C. M. Bradford
    • 2
    • 5
  • S. Chapman
    • 6
  • G. Che
    • 7
  • S. Doyle
    • 4
  • J. Glenn
    • 1
  • S. Gordon
    • 7
  • M. Hollister
    • 2
  • A. Kovács
    • 2
  • H. G. LeDuc
    • 5
  • P. Mauskopf
    • 7
  • R. McGeehan
    • 3
  • C. McKenney
    • 8
  • T. Reck
    • 4
  • J. Redford
    • 2
  • C. Ross
    • 6
  • C. Shiu
    • 2
  • C. Tucker
    • 4
  • J. Turner
    • 9
  • S. Walker
    • 1
  • J. Zmuidzinas
    • 2
    • 5
  1. 1.Center for Astrophysics and Space AstronomyUniversity of ColoradoBoulderUSA
  2. 2.California Institute of TechnologyPasadenaUSA
  3. 3.Department of Astronomy and AstrophysicsUniversity of ChicagoChicagoUSA
  4. 4.School of Physics and AstronomyCardiff UniversityCardiffUK
  5. 5.Jet Propulsion LaboratoryPasadenaUSA
  6. 6.Department of Physics and Atmospheric ScienceDalhousie UniversityHalifaxCanada
  7. 7.Department of Physics, School of Earth and Space ExplorationArizona State UniversityTempeUSA
  8. 8.National Institute of Standards and TechnologyBoulderUSA
  9. 9.Department of Physics and AstronomyUniversity of WyomingLaramieUSA

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