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arXiv · 1403.6205

Silver-Epoxy Microwave Filters and Thermalizers for Millikelvin Experiments

C. P. Scheller·S. Heizmann·K. Bedner·D. Giss·M. Meschke·D. M. Zumbühl·J. D. Zimmerman·A. C. Gossard
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Abstract

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.

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C. P. Scheller, S. Heizmann, K. Bedner, D. Giss, M. Meschke, D. M. Zumbühl, J. D. Zimmerman, A. C. Gossard. 2014-03-25. Silver-Epoxy Microwave Filters and Thermalizers for Millikelvin Experiments. https://doi.org/10.1063/1.4880099

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