TY  - JOUR
AU  - Karasik, Boris S.
AU  - Cantor, Robin
PY  - 2010
DA  - 2010//
TI  - Optical NEP in hot-electron nanobolometers
SP  - 1
EP  - 7
KW  - HEB
KW  - Ti
KW  - NEP
KW  - femtowatt
KW  - SAFARI
KW  - SPICA
KW  - 650 GHz
KW  - 0.65 THz
KW  - 460 um
KW  - twin slot antenna
KW  - SQUID readout
AB  - 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.
UR  - http://arxiv.org/abs/1009.4676v1
N1  - To appear in Proc. 21st Int. Symp. on Spc. THz Technol., Oxford, UK, 23-25 March, 2010
ID  - Karasik+Cantor2010
ER  -