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Proceedings Paper

Status of SuperSpec: a broadband, on-chip millimeter-wave spectrometer
Author(s): S. Hailey-Dunsheath; E. Shirokoff; P. S. Barry; C. M. Bradford; G. Chattopadhyay; P. Day; S. Doyle; M. Hollister; A. Kovacs; H. G. LeDuc; P. Mauskopf; C. M. McKenney; R. Monroe; R. O'Brient; S. Padin; T. Reck; L. Swenson; C. E. Tucker; J. Zmuidzinas
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Paper Abstract

SuperSpec is a novel on-chip spectrometer we are developing for multi-object, moderate resolution (R = 100 − 500), large bandwidth (~1.65:1) submillimeter and millimeter survey spectroscopy of high-redshift galaxies. The spectrometer employs a filter bank architecture, and consists of a series of half-wave resonators formed by lithographically-patterned superconducting transmission lines. The signal power admitted by each resonator is detected by a lumped element titanium nitride (TiN) kinetic inductance detector (KID) operating at 100 – 200 MHz. We have tested a new prototype device that is more sensitive than previous devices, and easier to fabricate. We present a characterization of a representative R = 282 channel at f = 236 GHz, including measurements of the spectrometer detection efficiency, the detector responsivity over a large range of optical loading, and the full system optical efficiency. We outline future improvements to the current system that we expect will enable construction of a photon-noise-limited R = 100 filter bank, appropriate for a line intensity mapping experiment targeting the [CII] 158 μm transition during the Epoch of Reionization.

Paper Details

Date Published: 19 August 2014
PDF: 16 pages
Proc. SPIE 9153, Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy VII, 91530M (19 August 2014); doi: 10.1117/12.2057229
Show Author Affiliations
S. Hailey-Dunsheath, California Institute of Technology (United States)
E. Shirokoff, The Univ. of Chicago (United States)
P. S. Barry, Cardiff Univ. (United Kingdom)
C. M. Bradford, Jet Propulsion Lab. (United States)
G. Chattopadhyay, Jet Propulsion Lab. (United States)
P. Day, Jet Propulsion Lab. (United States)
S. Doyle, Cardiff Univ. (United Kingdom)
M. Hollister, California Institute of Technology (United States)
A. Kovacs, Univ. of Minnesota, Twin Cities (United States)
H. G. LeDuc, Jet Propulsion Lab. (United States)
P. Mauskopf, Cardiff Univ. (United Kingdom)
Arizona State Univ. (United States)
C. M. McKenney, California Institute of Technology (United States)
R. Monroe, Jet Propulsion Lab. (United States)
R. O'Brient, California Institute of Technology (United States)
S. Padin, California Institute of Technology (United States)
T. Reck, California Institute of Technology (United States)
L. Swenson, California Institute of Technology (United States)
C. E. Tucker, Cardiff Univ. (United Kingdom)
J. Zmuidzinas, California Institute of Technology (United States)
Jet Propulsion Lab. (United States)


Published in SPIE Proceedings Vol. 9153:
Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy VII
Wayne S. Holland; Jonas Zmuidzinas, Editor(s)

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