182 citations · 268 across the 10 of their papers we have counts for
10 papers
Coulomb Blockade Thermometry on a Wide Temperature Range
O. M. Hahtela, A. Kemppinen, J. Lehtinen +11
The Coulomb Blockade Thermometer (CBT) is a primary thermometer for cryogenic temperatures, with demonstrated operation from below 1 mK up to 60 K. Its performance as a primary the…
Driving a low critical current Josephson junction array with a mode-locked laser
J. Nissila, T. Fordell, K. Kohopaa +11
We demonstrate the operation of Josephson junction arrays (JJA) driven by optical pulses generated by a mode-locked laser and an optical time-division multiplexer. A commercial pho…
Realisation of a quantum current standard at liquid helium temperature with sub-ppm reproducibility
Stephen Giblin, Emma Mykkänen, Antti Kemppinen +7
A silicon electron pump operating at the temperature of liquid helium has demonstrated repeatable operation with sub-ppm accuracy. The pump current, approximately 168 pA, is measur…
Mini array of quantum Hall devices based on epitaxial graphene
S. Novikov, N. Lebedeva, J. Hamalainen +4
Series connection of four quantum Hall effect (QHE) devices based on epitaxial graphene films was studied for realization of a quantum resistance standard with an up-scaled value.…
Suppression of the critical current of a balanced SQUID
Antti Kemppinen, Antti J. Manninen, Mikko Möttönen +3
We present an experimental study of the magnetic flux dependence of the critical current of a balanced SQUID with three Josephson junctions in parallel. Unlike for ordinary dc SQUI…
Microelectromechanical components in electrical metrology
Antti Manninen, Anu Karkkainen, Nadine Pesonen +2
Microelectromechanical systems (MEMS) can offer a competitive alternative for conventional technology in electrical precision measurements. This article summarises recent work in d…