Nanosecond Thermometry with Josephson Junctions

M. Zgirski, M. Foltyn, A. Savin, K. Norowski, M. Meschke, J. Pekola

Research output: Contribution to journalArticleScientificpeer-review

16 Citations (Scopus)
216 Downloads (Pure)


We demonstrate a new paradigm in nanoscale thermometry exploiting well-known switching measurements of a superconducting weak link. Such a weak link probed with nanosecond current pulses serves as a temperature-sensing element and, because of the fast inherent dynamics, is capable of delivering unprecedented temporal resolution. We use the thermometer to measure the dynamic temperature of electrons in a long superconducting wire relaxing to the bath temperature after application of a heating pulse, involving evaluation of the retrapping time. Our measurement delivers resolution better than 10 ns, with potential for further improvement. It extends the temporal resolution of existing experiments and introduces new possibilities for investigating thermodynamics at the nanoscale.

Original languageEnglish
Article number044068
Pages (from-to)1-11
JournalPhysical Review Applied
Issue number4
Publication statusPublished - 29 Oct 2018
MoE publication typeA1 Journal article-refereed

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