Silver-epoxy microwave filters and thermalizers for millikelvin experiments

Journal Article · Mon May 26 00:00:00 EDT 2014 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4880099· OSTI ID:22300134

Scheller, Christian P.; Heizmann, Sarah; Bedner, Kristine; Giss, Dominic; Meschke, Matthias ^[1]; Zimmerman, Jeramy D.; Gossard, Arthur C. ^[2]

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1. Low Temperature Laboratory, Aalto University, School of Science, 00076 Aalto (Finland)
2. Materials Department, University of California, Santa Barbara, California 93106 (United States)

We present silver-epoxy filters combining excellent microwave attenuation with efficient wire thermalization, suitable for low temperature quantum transport experiments. Upon minimizing parasitic capacitances, the attenuation reaches ≥100 dB above ≈150 MHz and—when capacitors are added—already above ≈30 MHz. We measure the device electron temperature with a GaAs quantum dot and demonstrate excellent filter performance. Upon improving the sample holder and adding a second filtering stage, we obtain electron temperatures as low as 7.5 ± 0.2 mK in metallic Coulomb blockade thermometers.

• OSTI ID: 22300134
• Journal Information: Applied Physics Letters, Vol. 104, Issue 21; Other Information: (c) 2014 Author(s); Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ATTENUATION
CAPACITORS
ELECTRON TEMPERATURE
EPOXIDES
FILTERS
GALLIUM ARSENIDES
MHZ RANGE
MICROWAVE RADIATION
QUANTUM DOTS
SILVER
TEMPERATURE RANGE 0000-0013 K
THERMALIZATION
THERMOMETERS