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, Philip Mauskopf, R. McGeehan, C. McKenney, T. Reck, J. Redford, C. Ross, C. ShiuC. Tucker, J. Turner, S. Walker, J. Zmuidzinas

Research output: Contribution to journalArticlepeer-review

12 Scopus citations


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∼ 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 μ 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 ∼10cm2 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 μ m 3) and the incorporation of a new broadband antenna. A detector NEP of 3–4 × 10 - 18 W/Hz0.5 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.

Original languageEnglish (US)
Pages (from-to)408-414
Number of pages7
JournalJournal of Low Temperature Physics
Issue number3-4
StatePublished - Nov 1 2018


  • Antenna
  • Bow tie
  • Kinetic inductance detectors
  • NEP
  • Spectrometer
  • mm-wave

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Materials Science(all)
  • Condensed Matter Physics


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