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Extending KIDs to the Mid-IR for Future Space and Suborbital Observatories.

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  • 1Department of Astrophysics and Planetary Sciences, University of Colorado at Boulder, Boulder, CO 80309 USA.

Journal of Low Temperature Physics
|July 7, 2020
PubMed
Summary

Researchers are developing novel low-noise detectors for the Galaxy Evolution Probe (GEP) mission to study galaxy formation. These kinetic inductance detectors (KIDs) aim to improve mid- and far-infrared observations, crucial for understanding cosmic star formation.

Keywords:
10 micronAstrophysicsFar-infraredKinetic inductance detectorMid-infrared

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Area of Science:

  • Astrophysics and cosmology
  • Instrument development for space observatories
  • Infrared astronomy

Background:

  • The Galaxy Evolution Probe (GEP) mission requires sensitive mid- and far-infrared detectors for studying galaxy evolution and star formation.
  • Current detector technology faces limitations for the wide wavelength coverage needed for GEP.
  • Kinetic Inductance Detectors (KIDs) offer a promising avenue for sensitive infrared detection.

Purpose of the Study:

  • To develop low-noise aluminum kinetic inductance detectors (KIDs) for the Galaxy Evolution Probe (GEP) and its pathfinder balloon mission (GEP-B).
  • To enable sensitive observations in the 10-400 micrometer wavelength range, particularly focusing on the previously unaddressed 10-100 micrometer range.
  • To present a novel absorber design for KIDs optimized for specific infrared wavelengths.

Main Methods:

  • Utilized ANSYS HFSS (high-frequency structure simulator) for simulating absorber designs of KIDs.
  • Designed and fabricated KIDs specifically for the 10 micrometer wavelength range.
  • Performed theoretical calculations for Noise Equivalent Power (NEP).

Main Results:

  • Simulations show the proposed absorber design achieves 75-80% absorption efficiency at 10 micrometers.
  • Initial tests on fabricated 10 micrometer KIDs were conducted.
  • Theoretical NEP calculations were performed.

Conclusions:

  • The developed KIDs show potential for GEP and GEP-B missions, addressing the need for sensitive infrared detection.
  • The absorber design is a critical step towards extending KID sensitivity to lower wavelengths (10-100 micrometers).
  • Further optimization and testing are required to meet the full wavelength requirements for GEP.