Optical characterization at 1.5-3 THz of high sensitivity TES detectors designed for future far-infrared space missions

Philip Mauskopf, D. Morozov, P. A R Ade, D. Griffin, D. Goldie, D. Glowacka, A. Velichko, S. Withington

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

High sensitivity TES detectors are being developed for use in future Far-Infrared (FIR) space missions such as SPICA, FIRI, SAFIR, SPIRIT and SPECS. These missions plan on implementing actively cooled telescope optics to minimize the level of background radiation in the instrument and allow several orders of magnitude increase in sensitivity over current space missions such as HERSCHEL and SPITZER. The combination of low emission from the cooled telescope and the low-background environment from space results in a photon flux of on order several thousands of photons per second in a 50% bandwidth and a level of photon noise equivalent power (NEP) in the range NEP=10-20 - 10-18 W/Hz depending on the details of the instrument design. In this paper, we describe the optical characterization of high-sensitivity TES detectors designed for operation in the wavelength range from 100-200 μm (1.5-3 THz). A detector consists of a TES thermometer (MoCu or MoAu) and an optical absorber fabricated from a thin Tantalum (Ta) film deposited on a thermally isolating silicon nitride (SiN) structure. The TES thermometers have a transition temperatures of approximately 100 mK and the measured thermal conductance agrees with the design values of G = 0.2-0.5 pW/K corresponding to a phonon limited detector NEP < 10-18 W/Hz. We measure the absorbed optical power from a blackbody source as a function of source temperature through a set of two high pass and two low pass filters defining a pass band from 1.5-3 THz. The radiation from the blackbody source is coupled to an integrating cavity containing the TES and absorber using an electroformed conical horn. We find that this system has good optical performance and the dependence of absorbed power on blackbody temperature agrees with the values calculated from the combination of the blackbody emission spectrum and the measured filter transmission. We compare the measured optical efficiencies for different absorber geometries and impedances.

Original languageEnglish (US)
Title of host publication22nd International Symposium on Space Terahertz Technology 2011, ISSTT 2011
PublisherInternational Symposium on Space Terahertz Technology
Pages51
Number of pages1
StatePublished - 2011
Externally publishedYes
Event22nd International Symposium on Space Terahertz Technology 2011, ISSTT 2011 - Tucson, AZ, United States
Duration: Apr 25 2011Apr 28 2011

Other

Other22nd International Symposium on Space Terahertz Technology 2011, ISSTT 2011
CountryUnited States
CityTucson, AZ
Period4/25/114/28/11

Fingerprint

space missions
Infrared radiation
Detectors
absorbers
Photons
Thermometers
sensitivity
detectors
thermometers
Telescopes
photons
telescopes
filter
Radiation
tantalum
low pass filters
background radiation
temperature
Low pass filters
Tantalum

ASJC Scopus subject areas

  • Computer Networks and Communications
  • Space and Planetary Science
  • Electrical and Electronic Engineering
  • Atomic and Molecular Physics, and Optics
  • Radiation

Cite this

Mauskopf, P., Morozov, D., Ade, P. A. R., Griffin, D., Goldie, D., Glowacka, D., ... Withington, S. (2011). Optical characterization at 1.5-3 THz of high sensitivity TES detectors designed for future far-infrared space missions. In 22nd International Symposium on Space Terahertz Technology 2011, ISSTT 2011 (pp. 51). International Symposium on Space Terahertz Technology.

Optical characterization at 1.5-3 THz of high sensitivity TES detectors designed for future far-infrared space missions. / Mauskopf, Philip; Morozov, D.; Ade, P. A R; Griffin, D.; Goldie, D.; Glowacka, D.; Velichko, A.; Withington, S.

22nd International Symposium on Space Terahertz Technology 2011, ISSTT 2011. International Symposium on Space Terahertz Technology, 2011. p. 51.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Mauskopf, P, Morozov, D, Ade, PAR, Griffin, D, Goldie, D, Glowacka, D, Velichko, A & Withington, S 2011, Optical characterization at 1.5-3 THz of high sensitivity TES detectors designed for future far-infrared space missions. in 22nd International Symposium on Space Terahertz Technology 2011, ISSTT 2011. International Symposium on Space Terahertz Technology, pp. 51, 22nd International Symposium on Space Terahertz Technology 2011, ISSTT 2011, Tucson, AZ, United States, 4/25/11.
Mauskopf P, Morozov D, Ade PAR, Griffin D, Goldie D, Glowacka D et al. Optical characterization at 1.5-3 THz of high sensitivity TES detectors designed for future far-infrared space missions. In 22nd International Symposium on Space Terahertz Technology 2011, ISSTT 2011. International Symposium on Space Terahertz Technology. 2011. p. 51
Mauskopf, Philip ; Morozov, D. ; Ade, P. A R ; Griffin, D. ; Goldie, D. ; Glowacka, D. ; Velichko, A. ; Withington, S. / Optical characterization at 1.5-3 THz of high sensitivity TES detectors designed for future far-infrared space missions. 22nd International Symposium on Space Terahertz Technology 2011, ISSTT 2011. International Symposium on Space Terahertz Technology, 2011. pp. 51
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