Single Pixel Thermal Camera based on Liquid Crystal Resonant Structures SPT-Cam

Single pixel liquid Crystal (SPLC) layer combined with light responsive material such as semiconductor form what is called optically addressed spatial light modulator which is used for optical computing and image conversion. When LCs are part of a resonant photonic structure the optical readout can be made of narrow optical signatures and the strong electro/thermooptic effects in the LC reveal strong variations of the readout signal. Motivated by this approach several modes examined to demonstrate SPLC infrared/thermal camera using IR photosensors, VO2 bolometric layer, porous Si, and graphite as thermal absorption layer. Semiconductor photosensors gave the best performance until now.