Publication Date:
2019-07-13
Description:
We have fabricated absorber-coupled microwave kinetic inductance detector (MKID) arrays for sub-millimeter and farinfrared astronomy. Each detector array is comprised of lambda/2 stepped impedance resonators, a 1.5m thick silicon membrane, and 380m thick silicon walls. The resonators consist of parallel plate aluminum transmission lines coupled to low impedance Nb microstrip traces of variable length, which set the resonant frequency of each resonator. This allows for multiplexed microwave readout and, consequently, good spatial discrimination between pixels in the array. The Al transmission lines simultaneously act to absorb optical power and are designed to have a surface impedance and filling fraction so as to match the impedance of free space. Our novel fabrication techniques demonstrate high fabrication yield of MKID arrays on large single crystal membranes and sub-micron front-to-back alignment of the microstrip circuit.
Keywords:
Astronomy; Instrumentation and Photography
Type:
GSFC-E-DAA-TN9654
,
Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy; Jun 29, 2010 - Jul 02, 2010; San Diego, CA; United States|Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy V; 7741; 77410P-1-77410P-10
Format:
application/pdf
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