skip to main content

SciTech ConnectSciTech Connect

Title: Silver-epoxy microwave filters and thermalizers for millikelvin experiments

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.
Authors:
; ; ; ;  [1] ;  [2] ; ;  [3]
  1. Department of Physics, University of Basel, Klingelbergstrasse 82, CH-4056 Basel (Switzerland)
  2. Low Temperature Laboratory, Aalto University, School of Science, 00076 Aalto (Finland)
  3. Materials Department, University of California, Santa Barbara, California 93106 (United States)
Publication Date:
OSTI Identifier:
22300134
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 104; Journal Issue: 21; Other Information: (c) 2014 Author(s); Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
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