Abstract
Far-infrared (FIR) wavelength light provides a wealth of information about astrophysical processes. Large field-of-view FIR spectrometers face a variety of challenges that can be bypassed by utilizing on-chip filter bank technology. To this end, we have been developing microwave kinetic inductance detectors (MKIDs) to couple to on-chip spectrometric technologies. We utilize a unique two-silicon wafer design to create a waveguide for an on-chip spectrometer between 1.4 and 2 THz. The spectrometer’s principle of operation is electromagnetic radiation traveling down a center waveguide before being picked off by a resonance cavity and absorbed by a detector. The MKIDs are designed to couple directly to the waveguide using an annular antenna shape for the inductor. Alignment of the two-wafer design is achieved with two dowel pins and a hole and slot pattern in our custom designed box. We present the design and early test data from a 18-channel prototype device. The prototype yielded the full 18 resonances with quality factors Qc of about 5×104 and Qi of about 1×104. We plan to use the technology we developed to create an n×n pixel device targeting R=100.
Original language | English (US) |
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Pages (from-to) | 230-237 |
Number of pages | 8 |
Journal | Journal of Low Temperature Physics |
Volume | 214 |
Issue number | 3-4 |
DOIs | |
State | Published - Feb 2024 |
Externally published | Yes |
Keywords
- LEKID
- MKID
- Spectrometer
- Terahertz
ASJC Scopus subject areas
- Atomic and Molecular Physics, and Optics
- General Materials Science
- Condensed Matter Physics