Abstract: A two-dimensional infrared focal plane employing a uniquely configured detector array for reducing the thermal conductance between detectors and between each detector and its environment to enhance signal-to-noise and spacial resolution without requiring cumbersome cooling. An array of radiation concentrators placed between the detector array and the image and spaced from the array, permits widely spaced detectors without incurring any substantial dead space on the detector plane. Detector support configurations provide for connection to nodes of a readout IC substrate while positioning each detector over an air-filled or evacuated chamber to further reduce thermal conductivity.