Abstract
A new type of high-performance and polarization-sensitive bolometer to detect millimeter waves is proposed, fabricated, and characterized using a Mn-Co-Ni-O film. The proposed bolometer successfully avoids the complicated micro-bridge structure and experimentally achieves sensitive polarization detection by planar dipole antennas. Besides, we introduce periodic metal grating structures on the active material to further improve the performance of the antenna-coupled bolometer. It exhibits a maximal responsivity of 440.2 V · W−1 and a detectivity of 6.7 × 106 cm · Hz1/2 · W−1 @ 10 Hz in the Ka-band at room temperature. Our approach is simple, effective, and compatible with the current manufacturing process and useful to the development of high-performance and polarization-sensitive bolometer arrays in the future.
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