Fig. 1.

CQD-based infrared sensors and imaging FPAs. a Schematic illustration of CQD-based photodiode fabricated directly onto silicon ROIC. b Comparison of specific detectivities obtained from PbS CQD photodiode test pixel and commercial InGaAs photodiode. c Picture of a packaged PbS CQD-based photodiode array. d, e Images obtained from PbS CQD-based SWIR FPA and HgTe CQD-based MWIR FPA, respectively

(Figures reproduced with permission from SPIE: a–c ref. [7]; d ref. [8]; e [9]. Copyright SPIE 2015, 2016)