Microwave nanobolometer based on proximity Josephson junctions

J. Govenius, R.E. Lake, K.Y. Tan, V. Pietilä, J.K. Julin, I.J. Maasilta, P. Virtanen, M. Möttönen

Tutkimustuotos: LehtiartikkeliArticleScientificvertaisarvioitu

25 Sitaatiot (Scopus)
155 Lataukset (Pure)

Abstrakti

We introduce a microwave bolometer aimed at high-quantum-efficiency detection of wave packet energy within the framework of circuit quantum electrodynamics, the ultimate goal being single microwave photon detection. We measure the differential thermal conductance between the detector and its heat bath, obtaining values as low as 5fW/K at 50mK. This is one tenth of the thermal conductance quantum and corresponds to a theoretical lower bound on noise-equivalent power of order 10−20W/√Hz at 50mK. By measuring the differential thermal conductance of the same bolometer design in substantially different environments and materials, we determine that electron-photon coupling dominates the thermalization of our nanobolometer.
AlkuperäiskieliEnglanti
Artikkeli064505
Sivut1-8
JulkaisuPhysical Review B
Vuosikerta90
Numero6
DOI - pysyväislinkit
TilaJulkaistu - 2014
OKM-julkaisutyyppiA1 Julkaistu artikkeli, soviteltu

Tutkimusalat

  • bolometer
  • proximity Josephson junction

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