A composite material that is responsive to either electromagnetic or thermal radiation. The composite has a controllable structure that is either dynamically or tunably responsive to such radiation and comprises a metamaterial. Sensors, such as a bolometer, that incorporate the composite are also described.
STATEMENT REGARDING FEDERAL RIGHTS
 This invention was made with government support under Contract No. DE-AC52-06NA25396, awarded by the U.S. Department of Energy. The government has certain rights in the invention.