Noise measurements in hot-electron titanium nanobolometers

Boris S. Karasik, Sergey V. Pereverzev, David Olaya, Jian Wei, Michael E. Gershenson, Andrei V. Sergeev

Research output: Contribution to journalArticlepeer-review

14 Scopus citations


We are presenting experimental results on the electrical noise in small titanium hot-electron nanobolometers with the critical temperature above 300 mK. The noise data demonstrate good agreement with the conventional bolometer theory prediction. The noise is dominated by the thermal energy fluctuations (phonon noise) when the operating temperature is set just a few mK below the superconducting transition. The corresponding noise equivalent power (NEP) is about 3 x 10-18 W/Hz1/2 for the smallest measured device. The relative NEP's for the two devices measured scale roughly as the square root of the device volume as one would expect from the theory. Therefore an additional factor of 2-3 reduction of NEP may be feasible if the length and width of our device are further reduced. The demonstrated combination of the low NEP and the relatively high operating temperature is attractive for submillimeter low-background applications.

Original languageEnglish (US)
Article number5153086
Pages (from-to)532-535
Number of pages4
JournalIEEE Transactions on Applied Superconductivity
Issue number3
StatePublished - Jun 2009
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering


  • Bolometers
  • Submillimeter wave detectors
  • Superconducting device noise
  • Superconducting radiation detectors


Dive into the research topics of 'Noise measurements in hot-electron titanium nanobolometers'. Together they form a unique fingerprint.

Cite this