Antenna coupled niobium bolometers for 10 (mu)m radiation detection
Robert Hadfield, Aaron J. Miller, Sae Woo Nam, Erich N. Grossman, Robert E. Schwall,
We report on the fabrication and testing of antenna-coupled niobium bolometers for 10-micron wavelength radiation detection. We use 20 nm thick Nb films on oxidized Si substrates. The bolometer design consists of a 1 micron x 1 micron Nb microbridge embedded in either a dipole or a spiral Au antenna. We have performed dark dc tests on devices in both liquid He and vacuum at 4.2 K. Current biased dark measurements correspond well to established theory (Skocpol Beasley Tinkham). This allows us to extract a value for thermal conductance g -hence an indirect measure of the device bandwidth. Measurements under incident blackbody radiation perturb the return switching characteristics of the devices.
IEEE Transactions on Applied Superconductivity
, Miller, A.
, Nam, S.
, Grossman, E.
and Schwall, R.
Antenna coupled niobium bolometers for 10 (mu)m radiation detection, IEEE Transactions on Applied Superconductivity
(Accessed December 6, 2023)