TY - JOUR
T1 - Antenna Coupled MKID Performance Verification at 850 GHz for Large Format Astrophysics Arrays
AU - Ferrari, Lorenza
AU - Yurduseven, Ozan
AU - Llombart, Nuria
AU - Yates, Stephen J.C.
AU - Bueno, Juan
AU - Murugesan, Vignesh
AU - Thoen, David J.
AU - Endo, Akira
AU - Baryshev, Andrey M.
AU - Baselmans, Jochem J.A.
PY - 2018
Y1 - 2018
N2 - Next generation sub-mm imaging instruments require kilo-pixel focal plane arrays filled with background limited detectors. Microwave kinetic inductance detectors (MKIDs) are a state-of-the-art detector for future instruments due to their inherent multiplexing capabilities. An MKID consists of a superconducting resonator coupled to a feed-line that is used for readout. In the device presented here radiation coupling is achieved by coupling the MKID directly to a planar antenna. The antenna is placed in the focus of an extended hemispherical lens to increase the filling factor and to match efficiently to fore optics. In this paper, we present the design and the optical performance of MKIDs optimized for operation in a 100-GHz band around 850 GHz. We have measured the coupling efficiency, frequency response, and beam patterns and compare those results to simulated performance. We obtain an excellent agreement between the measured and simulated beam pattern, frequency response, and absolute coupling efficiency between a thermal calibration source and the power absorbed in the detector. Additionally, we demonstrate that antenna coupled MKIDs offer background limited radiation detection down to ∼100 aW of power absorbed in the detector.
AB - Next generation sub-mm imaging instruments require kilo-pixel focal plane arrays filled with background limited detectors. Microwave kinetic inductance detectors (MKIDs) are a state-of-the-art detector for future instruments due to their inherent multiplexing capabilities. An MKID consists of a superconducting resonator coupled to a feed-line that is used for readout. In the device presented here radiation coupling is achieved by coupling the MKID directly to a planar antenna. The antenna is placed in the focus of an extended hemispherical lens to increase the filling factor and to match efficiently to fore optics. In this paper, we present the design and the optical performance of MKIDs optimized for operation in a 100-GHz band around 850 GHz. We have measured the coupling efficiency, frequency response, and beam patterns and compare those results to simulated performance. We obtain an excellent agreement between the measured and simulated beam pattern, frequency response, and absolute coupling efficiency between a thermal calibration source and the power absorbed in the detector. Additionally, we demonstrate that antenna coupled MKIDs offer background limited radiation detection down to ∼100 aW of power absorbed in the detector.
KW - Cryogenic
KW - detectors
KW - modeling
KW - planar arrays
KW - radiation pattern
UR - http://www.scopus.com/inward/record.url?scp=85037616853&partnerID=8YFLogxK
UR - http://resolver.tudelft.nl/uuid:5717e089-4dcc-40b9-a3f5-fe47a8c95cbe
U2 - 10.1109/TTHZ.2017.2764378
DO - 10.1109/TTHZ.2017.2764378
M3 - Article
VL - 8
SP - 127
EP - 139
JO - IEEE Transactions on Terahertz Science and Technology
JF - IEEE Transactions on Terahertz Science and Technology
SN - 2156-342X
IS - 1
M1 - 8123515
ER -