%0 Journal Article
%T Optical NEP in hot-electron nanobolometers
%A Karasik, Boris S.
%A Cantor, Robin
%D 2010
%F Karasik+Cantor2010
%O To appear in Proc. 21st Int. Symp. on Spc. THz Technol., Oxford, UK, 23-25 March, 2010
%O exported from refbase (https://db.rplab.ru/refbase/show.php?record=623), last updated on Thu, 07 Oct 2010 17:57:27 -0500
%X For the first time, we have measured the optical noise equivalent power (NEP) in titanium (Ti) superconducting hot-electron nanobolometers (nano-HEBs). The bolometers were 2{\mu}mx1{\mu}mx20nm and 1{\mu}mx1{\mu}mx20nm planar antenna-coupled devices. The measurements were done at {\lambda} = 460 {\mu}m using a cryogenic black body radiation source delivering optical power from a fraction of a femtowatt to a few 100s of femtowatts. A record low NEP = 3x10^{-19} W/Hz^{1/2} at 50 mK has been achieved. This sensitivity meets the requirements for SAFARI instrument on the SPICA telescope. The ways for further improvement of the nano-HEB detector sensitivity are discussed.
%K HEB
%K Ti
%K NEP
%K femtowatt
%K SAFARI
%K SPICA
%K 650 GHz
%K 0.65 THz
%K 460 um
%K twin slot antenna
%K SQUID readout
%U http://arxiv.org/abs/1009.4676v1
%P 1-7