Surface plasmon-assisted terahertz imaging array

In this paper, a spoof surface plasmon assisted antenna is paired with a metamaterial enhanced bolometer structure in the formation of a THz focal plane array pixel. The antenna element focuses the electromagnetic wave onto the bolometer element and the bolometer detects this incident power through resistance change. Numerical analysis was performed in order to simulate the plasmonic structure at 0.1 and 0.3 THz. This system was then fabricated and detailed measurements were carried out. This system shows high sensitivity at the desired operating frequency. The performance of the spoof plasmon antenna is favorable when considering the same size of the aperture without exciting plasmonic modes.