A Vacuum Waveguide Filter Bank Spectrometer for Far-Infrared Astrophysics

Rong Nie, Jeffrey Filippini, Elyssa Brooks, Peter Barry, Jake Connors, Marcin Gradziel, Dale Mercado, Vesal Razavimaleki, Erik Shirokoff, Locke Spencer, Serena Tramm, Neil Trappe, Michael Zemcov

Research output: Contribution to journalArticlepeer-review

Abstract

Traditional technologies for far-infrared (FIR) spectroscopy generally involve bulky dispersive optics. Integrated filter bank spectrometers promise more compact designs, but implementations using superconducting transmission line networks become lossy at terahertz frequencies. We describe a novel on-chip spectrometer architecture designed to extend this range. A filter bank spectrometer is implemented using vacuum waveguide etched into a silicon wafer stack. A single trunk line feeds an array of resonant cavities, each coupled to a kinetic inductance detector fabricated on an adjacent wafer. We discuss the design and fabrication of a prototype implementation, initial test results at ambient temperature, and prospects for future development.

Original languageEnglish (US)
Pages (from-to)408-416
Number of pages9
JournalJournal of Low Temperature Physics
Volume216
Issue number1-2
DOIs
StatePublished - Jul 2024

Keywords

  • Far-infrared
  • MKID
  • Spectroscopy
  • Terahertz

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • General Materials Science
  • Condensed Matter Physics

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