Title :
Modeling and Measuring the Optical Coupling of Lumped Element Kinetic Inductance Detectors at 120–180 GHz
Author :
Rosch, M.J. ; Mattiocco, F. ; Scherer, Theo A. ; Siegel, Mel ; Schuster, Kay
Author_Institution :
Inst. de Radioastronom. millimetrique (IRAM), St. Martin d´Hères, France
fDate :
4/1/2013 12:00:00 AM
Abstract :
The lumped element kinetic inductance detector (LEKID) is a novel device for high-sensitivity millimeter and submillimeter wave detection. Optimization of this cryogenic device requires the matching of the freespace impedance to the impedance of the absorbing structure defined by an inductance meander. Here we show how this coupling can be modeled and measured using a transmission line model, numerical simulations, and practical quasi-optical room-temperature reflection measurements. Simulations and measurements agree well and allow us to design optimized devices with remarkably high power absorption.
Keywords :
couplings; inductance measurement; lumped parameter networks; optical variables measurement; optimisation; submillimetre wave detectors; LEKID; cryogenic device; freespace impedance; frequency 120 GHz to 180 GHz; high power absorption; high-sensitivity submillimeter wave detection; inductance meander; lumped element kinetic inductance detectors; numerical simulations; optical coupling; optimization; practical quasioptical room-temperature reflection measurement; temperature 293 K to 298 K; transmission line model; Absorption; Detectors; Impedance; Reflection; Substrates; Temperature measurement; Transmission line measurements; Direct detector; kinetic inductance detector; microwave resonator; strip grating;
Journal_Title :
Antennas and Propagation, IEEE Transactions on
DOI :
10.1109/TAP.2012.2231933
