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

Wheeler, Jordan and Hailey-Dunsheath, S. and Shirokoff, E. and Barry, P. S. and Bradford, C. M. and Chapman, S. and Che, G. and Doyle, S. and Glenn, J. and Gordon, S. and Hollister, M. and Kovács, A. and LeDuc, H. G. and Mauskopf, P. and McGeehan, R. and McKenney, C. and Reck, T. and Redford, J. and Ross, C. and Shiu, C. and Tucker, C. and Turner, J. and Walker, S. and Zmuidzinas, J. (2018) SuperSpec, The On-Chip Spectrometer: Improved NEP and Antenna Performance. Journal of Low Temperature Physics, 193 (3-4). pp. 408-414. ISSN 0022-2291. doi:10.1007/s10909-018-1926-z.

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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 μm 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 ∼10 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 μm^3) and the incorporation of a new broadband antenna. A detector NEP of 3–4 ×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.

Item Type:Article
Related URLs:
URLURL TypeDescription ReadCube access
Wheeler, Jordan0000-0003-1678-5570
Hailey-Dunsheath, S.0000-0002-8504-7988
Shirokoff, E.0000-0002-2757-1423
Bradford, C. M.0000-0001-5261-7094
Glenn, J.0000-0001-7527-2017
Kovács, A.0000-0001-8991-9088
Mauskopf, P.0000-0001-6397-5516
McGeehan, R.0000-0001-5306-8285
McKenney, C.0000-0003-4917-4872
Reck, T.0000-0003-1425-0177
Tucker, C.0000-0002-1851-3918
Turner, J.0000-0003-4625-2951
Additional Information:© Springer Science+Business Media, LLC, part of Springer Nature 2018. Received: 19 October 2017 / Accepted: 16 April 2018. This work is supported in part by NASA Space Technology Research Fellowship NSTRF NNX15AQ09H and NSF AST ATI Grant 1407457.
Group:Astronomy Department
Funding AgencyGrant Number
NASA Space Technology Research FellowshipNNX15AQ09H
Issue or Number:3-4
Record Number:CaltechAUTHORS:20180504-145926098
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Official Citation:Wheeler, J., Hailey-Dunsheath, S., Shirokoff, E. et al. J Low Temp Phys (2018) 193: 408.
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:86228
Deposited By: George Porter
Deposited On:07 May 2018 14:28
Last Modified:15 Nov 2021 20:36

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