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19 April 2024 |
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Status of SuperSpec: A Broadband, On-Chip Millimeter-Wave Spectrometer | | 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
; | | Date: |
10 Jan 2015 | | 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 micron transition during the Epoch
of Reionization | | Source: | arXiv, 1501.2295 | | Services: | Forum | Review | PDF | Favorites | |
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