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Optical Measurements of SuperSpec: A Millimeter-Wave On-Chip Spectrometer

Hailey-Dunsheath, S. and Barry, P. S. and Bradford, C. M. and Chattopadhyay, G. and Day, P. and Doyle, S. and Hollister, M. and Kovacs, A. and LeDuc, H. G. and Llombart, N. and Mauskopf, P. and McKenney, C. and Monroe, R. and Nguyen, H. T. and O'Brient, R. and Padin, S. and Reck, T. and Shirokoff, E. and Swenson, L. and Tucker, C. E. and Zmuidzinas, J. (2014) Optical Measurements of SuperSpec: A Millimeter-Wave On-Chip Spectrometer. Journal of Low Temperature Physics, 176 (5-6). pp. 841-847. ISSN 0022-2291. doi:10.1007/s10909-013-1068-2.

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SuperSpec is a novel on-chip spectrometer we are developing for (sub)millimeter wavelength astronomy. Our approach utilizes a filterbank of moderate resolution (R∼500) channels, coupled to lumped element kinetic inductance detectors (KIDs), all integrated onto a single silicon chip. The channels are half-wave resonators formed by lithographically depositing segments of superconducting transmission line, and the KIDs are titanium nitride resonators. Here we present optical measurements of a first generation prototype, operating in the 180–280 GHz frequency range. We have used a coherent source to measure the spectral profiles of 17 channels, which achieve linewidths corresponding to quality factors as high as Q__(filt)=700, consistent with the designed values plus additional dissipation characterized by Q_i≈1440. We have also used a Fourier Transform Spectrometer to characterize the spectral purity of all 72 channels on the chip, and measure typical out of band responses ∼30 dB below the peak response.

Item Type:Article
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URLURL TypeDescription ReadCube access
Hailey-Dunsheath, S.0000-0002-8504-7988
Bradford, C. M.0000-0001-5261-7094
Chattopadhyay, G.0000-0001-7942-5025
Mauskopf, P.0000-0001-6397-5516
Additional Information:© 2014 Springer Science+Business Media New York. Received: 6 September 2013; accepted: 23 December 2013. Published online: 23 January 2014. This project is supported by NASA Astrophysics Research and Analysis (APRA) Grant No. 399131. ES, CMM, and LJS acknowledge support from the W. M. Keck Institute for Space Studies. MIH, LJS, and TR acknowledge support from the NASA Postdoctoral Program. PSB acknowledges the continuing support from the Science and Technology Facilities Council Ph.D studentship programme and grant programmes ST/G002711/1 and ST/J001449/1. Device fabrication was performed the JPL Microdevices Laboratory.
Group:Keck Institute for Space Studies
Funding AgencyGrant Number
Keck Institute for Space Studies (KISS)UNSPECIFIED
NASA Postdoctoral ProgramUNSPECIFIED
Science and Technology Facilities Council (STFC)ST/G002711/1
Science and Technology Facilities Council (STFC)ST/J001449/1
Subject Keywords:Kinetic inductance detector; Millimeter-wave; Spectroscopy
Issue or Number:5-6
Record Number:CaltechAUTHORS:20140129-105001183
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Official Citation:Hailey-Dunsheath, S., Barry, P.S., Bradford, C.M. et al. J Low Temp Phys (2014) 176: 841. doi:10.1007/s10909-013-1068-2
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:43545
Deposited On:29 Jan 2014 23:41
Last Modified:10 Nov 2021 16:39

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