Advanced Photonix, Inc. [ API ] - Advanced Photonix, Inc. (NYSE Amex: API) is professional in the design and development of high-performance silicon and III-V photodiodes, optoelectronic assemblies, and terahertz systems for markets worldwide and the mission of API is to support optoelectronic needs with a broad array of high-quality solutions.The Company has two manufacturing facilities: The corporate headquarters in Ann Arbor, Michigan, and the other one is in Camarillo, CA.