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Related Experiment Video

Updated: Jul 6, 2026

Fabrication and Characterization of High-Q Silicon Nitride Membrane Resonators
09:46

Fabrication and Characterization of High-Q Silicon Nitride Membrane Resonators

Published on: August 8, 2025

Silicon nitride Micromesh Bolometer Array for Submillimeter Astrophysics.

A D Turner, J J Bock, J W Beeman

    Applied Optics
    |March 28, 2008
    PubMed
    Summary
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    This study details a new feedhorn-coupled bolometer array for sensitive astronomical cameras. The array achieves near-theoretical noise performance, crucial for future space-based telescopes.

    Area of Science:

    • Astrophysics and Instrumentation
    • Detector Physics

    Background:

    • Sensitive photometer cameras are essential for astronomical observations.
    • Bolometer arrays require low noise and high efficiency for optimal performance.

    Purpose of the Study:

    • To design and characterize a feedhorn-coupled bolometer array for a 350-micrometer photometer camera.
    • To evaluate the noise performance and optical efficiency of the developed bolometer array.

    Main Methods:

    • Utilized silicon nitride micromesh absorbers and neutron-transmutation-doped germanium thermistors.
    • Employed indium bump bonds for thermistor attachment and vapor-deposited electrical leads.
    • Measured dark noise-equivalent power, heat capacity, and optical efficiency using blackbody calibration sources.

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    Last Updated: Jul 6, 2026

    Fabrication and Characterization of High-Q Silicon Nitride Membrane Resonators
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    Published on: August 8, 2025

    Characterization of SiN Integrated Optical Phased Arrays on a Wafer-Scale Test Station
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    Published on: April 1, 2020

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    Fabrication and Characterization of Superconducting Resonators

    Published on: May 21, 2016

    Main Results:

    • Achieved a dark noise-equivalent power of 2.9 x 10^-17 W/√Hz and a mean heat capacity of 1.3 pJ/K at 390 mK.
    • Measured optical efficiency between 0.45-0.65.
    • Demonstrated theoretical noise performance with photon noise dominance, a total-to-photon noise ratio of 1.21, and negligible excess noise.

    Conclusions:

    • The bolometer array meets the sensitivity requirements for photon noise-limited performance.
    • Feedhorn coupling enhances detector performance for spaceborne applications.
    • Micromesh bolometers offer promising performance limits for future astronomical instruments.