The design and characterization of a 300 channel, optimized full-band millimeter filterbank for science with SuperSpec

J. Redford; J. Wheeler; K. Karkare; S. Hailey-Dunsheath; C. M. Bradford; E. Shirokoff; P. S. Barry; G. Che; J. Glenn; H. G. Leduc; P. Mauskopf; R. McGeehan; T. Reck; J. Zmuidzinas

doi:10.1117/12.2313666

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9 July 2018 The design and characterization of a 300 channel, optimized full-band millimeter filterbank for science with SuperSpec

J. Redford, J. Wheeler, K. Karkare, S. Hailey-Dunsheath, C. M. Bradford, E. Shirokoff, P. S. Barry, G. Che, J. Glenn, H. G. Leduc, P. Mauskopf, R. McGeehan, T. Reck, J. Zmuidzinas

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Proceedings Volume 10708, Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy IX; 107081O (2018) https://doi.org/10.1117/12.2313666
Event: SPIE Astronomical Telescopes + Instrumentation, 2018, Austin, Texas, United States

Abstract

SuperSpec is an integrated, on-chip spectrometer for millimeter and sub-millimeter astronomy. We report the approach, design optimization, and partial characterization of a 300 channel filterbank covering the 185 to 315 GHz frequency band that targets a resolving power R ~ 310, and fits on a 3.5×5.5 cm chip. SuperSpec uses a lens and broadband antenna to couple radiation into a niobium microstrip that feeds a bank of niobium microstrip half-wave resonators for frequency selectivity. Each half-wave resonator is coupled to the inductor of a titanium nitride lumped-element kinetic inductance detector (LEKID) that detects the incident radiation. The device was designed for use in a demonstration instrument at the Large Millimeter Telescope (LMT).

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J. Redford, J. Wheeler, K. Karkare, S. Hailey-Dunsheath, C. M. Bradford, E. Shirokoff, P. S. Barry, G. Che, J. Glenn, H. G. Leduc, P. Mauskopf, R. McGeehan, T. Reck, and J. Zmuidzinas "The design and characterization of a 300 channel, optimized full-band millimeter filterbank for science with SuperSpec", Proc. SPIE 10708, Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy IX, 107081O (9 July 2018); https://doi.org/10.1117/12.2313666

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