In this talk, I will review the recent developments in the understanding of the infrared optoelectronics processes in graphene and black phosphorus, and their possible application space. The infrared spectrum (-1mm-1 um) presents many opportunities for photonics applications. For example, silicon photonics has been a very vibrant field of research the past decade due to its potential for telecom and datacom applications, and operates at the 1.55 mm wavelength. There are also many applications for mid-infrared (25-2.5 mm) integrated nanophotonics. Most prominent example is for chemical and biosensing, in which such technology could enable lab-on-a-chip integrated sensors (1,2). In addition, mid-infrared integrated nanophotonics also offers the tantalizing prospect of exploiting an inherent mid-infrared transparency window in the atmosphere for high speed data communications (3). New materials continue to play a critical role in advancing these developments (4,5).