Abstract: A bolometric imaging system is disclosed which includes an array of nano-pixels, each including an optical stack, each including an absorptive layer where incident radiation is converted to heat which simultaneously acts as a first electrode layer vertically disposed adjacent the Free Layer, a fixed magnetic polarity layer (Fixed Layer) in a first magnetic direction, a barrier layer vertically disposed adjacent to the Fixed Layer, a selective magnetic polarity layer (Free Layer) vertically disposed adjacent to the barrier layer, a second electrode layer vertically disposed adjacent the Fixed Layer. Photons absorbed by the optical stack are converted into heat to thereby switch magnetic polarity in the Free Layer. The switch in polarity does not require the stack to be reset to a neutral state prior to such switching. Each nano-pixel output is a digital signal generated by photons above a pre-determined energy threshold. The system further includes a readout circuit.