Abstract
We discuss the design and optimization of the absorber for the long-wavelength arm of the Terahertz intensity mapper, a balloon-borne spectrometer employing kinetic inductance detectors. Electromagnetic simulations of our design indicate in-band absorption efficiency over ∼! 80% in both linear polarization modes. By developing custom transmission line model and mode-matching calculations, we find the absorption efficiency is affected by the absorber's reactive part and overall shape. These insights into the operation of this design provide guidance for its optimization for low-resistance absorber materials.
Original language | English (US) |
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Article number | 9186733 |
Pages (from-to) | 704-712 |
Number of pages | 9 |
Journal | IEEE Transactions on Terahertz Science and Technology |
Volume | 10 |
Issue number | 6 |
DOIs | |
State | Published - Nov 2020 |
Keywords
- Electromagnetic simulations
- Terahertz intensity mapper (TIM)
- kinetic inductance detector (KID)
- mode matching (MM) method
- transmission line theory
ASJC Scopus subject areas
- Radiation
- Electrical and Electronic Engineering