Printed Circuit Board Metal Powder Filters for Low Electron Temperatures

Abstract

We report the characterisation of printed circuit boards (PCB) metal powder filters and their influence on the effective electron temperature which is as low as 22 mK for a quantum dot in a silicon MOSFET structure in a dilution refrigerator. We investigate the attenuation behaviour (10 MHz- 20 GHz) of filter made of four metal powders with a grain size below 50 um. The room-temperature attenuation of a stainless steel powder filter is more than 80 dB at frequencies above 1.5 GHz. In all metal powder filters the attenuation increases with temperature. Compared to classical powder filters, the design presented here is much less laborious to fabricate and specifically the copper powder PCB-filters deliver an equal or even better performance than their classical counterparts.

13 pages, 5 figures, accepted for publication in Rev. Sci. Instrum

Cited by in corpus (17)

• Quantum tomography of an entangled three-spin state in silicon
• 1 minute parity lifetime of a NbTiN Cooper-pair transistor
• Electric-field dependent g-factor anisotropy in Ge-Si core-shell nanowire quantum dots
• Hotter is easier: unexpected temperature dependence of spin qubit frequencies
• Josephson effect in a few-hole quantum dot
• Engineering the microwave to infrared noise photon flux for superconducting quantum systems
• Highly tuneable hole quantum dots in Ge-Si core-shell nanowires
• Josephson supercurrent in a topological insulator without a bulk shunt
• Indium as a high cooling power nuclear refrigerant for quantum nanoelectronics
• Photon-assisted tunneling and charge dephasing in a carbon nanotube double quantum dot
• Quantum dot thermometry at ultra-low temperature in a dilution refrigerator with a ${}^4$He immersion cell
• Single-charge occupation in ambipolar quantum dots
• Absorptive filters for quantum circuits: Efficient fabrication and cryogenic power handling
• Study on the fabrication of low-pass metal powder filters for use at cryogenic temperatures
• Radio-frequency characterization of a supercurrent transistor made from a carbon nanotube
• Fast raster scan multiplexed charge stability measurements toward high-throughput quantum dot array calibration
• Superconducting gap and its Little-Parks like oscillations with high-order harmonics in lithium intercalated 1T-TiSe${}_2$