Broadband infrared radiation detector based on laser-induced graphene

A broadband high-frequency infrared radiation detector based on laser-induced graphene (LIG) obtained by pyrolysis of a polyimide film has been developed. The spectral characteristic of the detector's photoresponse corresponds to the spectrum of an absolute blackbody, except for features inherent to the setup. Unlike standard bolometers, the frequency dependence of the laser-induced graphene-based detector is determined by two different mechanisms. This results in a weak loss of the detector’s sensitivity at frequencies up to and higher 10 kHz. The detector's efficient light absorption across a broad spectral range (from 1 to 21 $\mu$m) under various conditions and its relatively high sensitivity ($\sim$0.16%/W) make it a promising candidate for the development of technologically simple and cost-effective infrared receivers.