Pyroelectric metamaterial millimeter-wave detector

We present experimental demonstration of a multi-functional metamaterial absorber, which operates as an efficient detector millimeter wave radiation at room temperature. Intimate integration pyroelectric crystal directly within the unit cell enables large area sensing element made up repeating cells that are nearly ten times smaller than operational wavelength. An un-amplified intrinsic responsivity 3.90 V/W is demonstrated 91.5 GHz, close to peak spectral absorption 97.8 GHz. Numerical full-wave electromagnetic simulations match well experiments and clarify underlying mechanism, while thermal permit optimization responsivity. The results show monolithic geometry functions represents ideal device platform for realization novel compact temperature imaging components.