Silver-Epoxy Microwave Filters and Thermalizers for Millikelvin Experiments

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.

4 pages, 4 figures (color), plus supplementary information 3 pages, 1 figure (color) as ancillary arXiv pdf (SOM.pdf)

References in corpus (8)

• Observation of the two-channel Kondo effect
• Nuclear Magnetism and Electronic Order in 13C Nanotubes
• Magnetic Ordering of Nuclear Spins in an Interacting 2D Electron Gas
• GaAs Quantum Dot Thermometry Using Direct Transport and Charge Sensing
• Silver-Epoxy Microwave Filters and Thermalizers for Millikelvin Experiments
• Millikelvin thermal and electrical performance of lossy transmission line filters
• Micro-fabricated electromagnetic filters for millikelvin experiments
• Microstrip filters for measurement and control of superconducting qubits

Cited by in corpus (27)

• Hyperfine-phonon spin relaxation in a single-electron GaAs quantum dot
• Tunnel-Junction Thermometry Down to Millikelvin Temperatures
• Nanoelectronic thermometers optimised for sub-10 millikelvin operation
• Progress in cooling nanoelectronic devices to ultra-low temperatures
• Silver-Epoxy Microwave Filters and Thermalizers for Millikelvin Experiments
• A modular ultra-high vacuum millikelvin scanning tunneling microscope
• On-and-off chip cooling of a Coulomb blockade thermometer down to 2.8 mK
• Accurate Coulomb Blockade Thermometry up to 60 Kelvin
• Engineering the microwave to infrared noise photon flux for superconducting quantum systems
• Cooling low-dimensional electron systems into the microkelvin regime
• Evolution of the quantum Hall bulk spectrum into chiral edge states
• Magnetic cooling for microkelvin nanoelectronics on a cryofree platform
• Spectroscopy of Quantum-Dot Orbitals with In-Plane Magnetic Fields
• Shot noise of a quantum dot measured with GHz stub impedance matching
• Intrinsic Metastabilities in the Charge Configuration of a Double Quantum Dot
• Piezo-driven sample rotation system with ultra-low electron temperature
• Quantum dot thermometry at ultra-low temperature in a dilution refrigerator with a ${}^4$He immersion cell
• Approaching ideal visibility in singlet-triplet qubit operations using energy-selective tunneling-based Hamiltonian estimation
• A ruthenium oxide thermometer for dilution refrigerators operating down to 5 mK
• Absorptive filters for quantum circuits: Efficient fabrication and cryogenic power handling
• AC Josephson effect in a gate-tunable Cd${}_3$As${}_2$ nanowire superconducting weak link
• Charge noise suppression in capacitively coupled singlet-triplet spin qubits under magnetic field
• Edge State Wave Functions from Momentum-Conserving Tunneling Spectroscopy
• Coherent backaction between spins and an electronic bath: Non-Markovian dynamics and low-temperature quantum thermodynamic electron cooling
• Visualizing dissipative charge carrier dynamics at the nanoscale with superconducting charge qubit microscopy
• Effectiveness of Some 0 dB Cryogenic Microwave Attenuators as Thermal Heatsinks
• Dominant end-tunneling effect in two distinct Luttinger liquids coexisting in one quantum wire