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SuperSpec: On-Chip Spectrometer Design, Characterization, and Performance

Redford, J. and Barry, P. S. and Bradford, C. M. and Chapman, S. and Glenn, J. and Hailey-Dunsheath, S. and Janssen, R. M. J. and Karkare, K. S. and LeDuc, H. G. and Mauskopf, P. and McGeehan, R. and Shirokoff, E. and Wheeler, J. and Zmuidzinas, J. (2022) SuperSpec: On-Chip Spectrometer Design, Characterization, and Performance. Journal of Low Temperature Physics . ISSN 0022-2291. doi:10.1007/s10909-022-02866-x.

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SuperSpec is an integrated, on-chip spectrometer for millimeter and sub-millimeter astronomy intended to pave the way for large-scale, multi-beam spectrometer instruments. SuperSpec is demonstrating a three beam, dual-polarization instrument for observing star formation in distant galaxies on the Large Millimeter Telescope , a 50 m telescope on Volcan Sierra Negra in Mexico. SuperSpec provides moderate resolution (R∼270−290) in the 1 mm atmospheric window (200–300 GHz) with a lithographically patterned filterbank on a 3.5 cm x 5.5 cm chip. The filterbank intended for deployment is implemented in niobium, fed by a lensed antenna, and using a extremely low-volume (2.6μm³) titanium nitride lumped element kinetic inductor detectors (LEKIDs) as the sensors. The small size of the spectrometer and inherent multiplexibility of the kinetic inductance detectors will allow the future use of SuperSpec in larger, multi-pixel/multi-object spectrometers far beyond the three-pixel spectrometer being demonstrated soon. We report the design of the spectrometer, laboratory characterization of devices for the upcoming SuperSpec deployment. This involves laboratory testing of the filterbank spectral response, and observing noise in the TiN KIDs.

Item Type:Article
Related URLs:
URLURL TypeDescription article ItemConference poster
Redford, J.0000-0001-6173-0558
Bradford, C. M.0000-0001-5261-7094
Glenn, J.0000-0001-7527-2017
Hailey-Dunsheath, S.0000-0002-8504-7988
Karkare, K. S.0000-0002-5215-6993
Mauskopf, P.0000-0001-6397-5516
McGeehan, R.0000-0001-5306-8285
Shirokoff, E.0000-0002-2757-1423
Wheeler, J.0000-0003-1678-5570
Additional Information:This work is supported in part by NASA Grant 399131.
Funding AgencyGrant Number
Subject Keywords:KIDs; Millimeter-wave; Spectrometer; Filterbank
Record Number:CaltechAUTHORS:20221005-265369100.7
Persistent URL:
Official Citation:Redford, J., Barry, P.S., Bradford, C.M. et al. SuperSpec: On-Chip Spectrometer Design, Characterization, and Performance. J Low Temp Phys (2022).
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:117269
Deposited By: Melissa Ray
Deposited On:12 Oct 2022 18:48
Last Modified:12 Oct 2022 18:48

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