Author
Silva, Jose R.Mirzaei, Behnam
Laauwen, Wouter
Hu, Qing
Groppi, Christopher E.
Walker, Christopher
Gao, Jian-Rong
More, Nikhil
Young, Abram
Khalatpour, Ali
Kulesa, Craig
Affiliation
Univ Arizona, Steward ObservIssue Date
2018
Metadata
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SPIE-INT SOC OPTICAL ENGINEERINGCitation
J. R. G. Silva, B. Mirzaei, W. Laauwen, N. More, A. Young, C. Kulesa, C. Walker, A. Khalatpour, Q. Hu, C. Groppi, and J. R. Gao "4×2 HEB receiver at 4.7 THz for GUSTO", Proc. SPIE 10708, Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy IX, 107080Z (9 July 2018); doi: 10.1117/12.2313410; https://doi.org/10.1117/12.2313410Rights
© 2018 SPIE.Collection Information
This item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at repository@u.library.arizona.edu.Abstract
GUSTO will be a NASA balloon borne terahertz observatory to be launched from Antarctica in late 2021 for a flight duration of 100-170 days. It aims at reviewing the life cycle of interstellar medium of our galaxy by simultaneously mapping the three brightest interstellar cooling lines: [OI] at 4.7 THz, [CII] at 1.9 THz, and [NII] at 1.4 THz; along 124 degrees of the galactic plane and through a part of the Large Magellanic Cloud. It will use three arrays of 4x2 mixers based on NbN hot electron bolometers (HEBs), which are currently the most sensitive mixers for high resolution spectroscopic astronomy at these frequencies. Here we report on the design of a novel 4.7 THz receiver for GUSTO. The receiver consists mainly of two subsystems: a 4x2 HEB quasi-optical mixer array and a 4.7 THz multi-beam LO. We describe the mixer array, which is designed as a compact monolithic unit. We show, for example, 10 potential HEB detectors with the state of the art sensitivity of 720 K measured at 2.5 THz. They have a variation in sensitivity smaller than 3%, while also meeting the LO uniformity requirements. For the multi-beam LO we demonstrate the combination of a phase grating and a single QCL at 4.7 THz, which generates 8 sub-LO beams, where the phase grating shows an efficiency of 75%. A preliminary concept for the integrated LO unit, including QCL, phase grating and beam matching optics is presented.ISSN
97815106196929781510619708
Version
Final published versionSponsors
European Union [730562]Additional Links
https://spiedigitallibrary.org/conference-proceedings-of-spie/10708/2313410/42-HEB-receiver-at-47-THz-for-GUSTO/10.1117/12.2313410.fullhttps://spiedigitallibrary.org/conference-presentations/10708/107080Z/42-HEB-receiver-at-47-THz-for-GUSTO/10.1117/12.2313410.5807227452001
ae974a485f413a2113503eed53cd6c53
10.1117/12.2313410