Sensitive bolometers using highhyphen;Tcsuperconducting thermometers for wavelengths 20ndash;300 mgr;m

摘要

Two types of sensitive highhyphen;Tcbolometer have been fabricated on 20hyphen;mgr;mhyphen;thick sapphire substrates with YBa2Cu3O7minus;dgr;thin film transition edge thermometers. The sensitivity of both devices is superior to commercially available, room temperature pyroelectric detectors. A 1times;1 mm bolometer with a radiation absorber of gold black smoke has a noise equivalent power NEP=2.4times;10minus;11W/Hz1/2at 10 Hz and has useful sensitivity over wavelengths 20ndash;100 mgr;m. A 3times;3 mm bolometer with a Bi film radiation absorber has NEP=3.6times;10minus;10W/Hz1/2at 10 Hz and has useful sensitivity over wavelengths 100ndash;300 mgr;m. Water vapor transmittance spectra were measured to demonstrate the sensitivity of both devices.