The Defense Advanced Research Projects Agency (DARPA) is seeking information on the feasibility, manufacturability, and application space of Very Large-scale Photonic Integration (VLPI). The agency is interested in disruptive ideas and concepts that can significantly advance the field of photonic integration. The request for information (RFI) is focused on two areas: the applications that can be uniquely enabled by VLPI photonic circuits and the current limitations and new approaches in design automation for VLPI photonic circuit design. Some key aspects of this opportunity include: • The development of photonic integrated circuits with millions of components • The establishment of a fabless design ecosystem for photonic circuits • The exploration of new applications for VLPI photonic circuits • The advancement of photonic circuit design automation and simulation capabilities • The development of novel photonic design algorithms and automation methodologies