Broadband and multispectral response of planar antennas for terahertz security screening

A passive, real-time security camera based on ultrawideband planar antennas and superconducting microbolometers has been developed and described in prior publications. As built, it provides images that are superpositions of images across the full 0.2-1.2 THz band of the planar antennas. In this work, we combine the superconducting microbolometers with a monochromator based on a frequency-selective surface, developed separately, to obtain multispectral images.