The fabrication and optimization of composite submillimeter wave bolometers with metal film absorbing elements and doped Ge thermometers are described. Performance characteristics are given for 4 × 4-mm bolometers designed for operation at both 4He and 3He temperatures. The performance expected from such bolometers when they are optimized for various values of background loading is calculated. Current dependent noise, which can arise from any of several sources, is included in the analysis. This can make it impossible to reach the background fluctuation noise limit. Feed structures for these bolometers which employ Winston light concentrators are described.
© 1978 Optical Society of America
N. S. Nishioka, P. L. Richards, and D. P. Woody, "Composite bolometers for submillimeter wavelengths," Appl. Opt. 17, 1562-1567 (1978)