A bandpass photodetector using a III-V nitride and having predetermined electrical properties. The bandpass photodetector detects electromagnetic radiation between a lower transition wavelength and an upper transition wavelength. That detector comprises two low pass photodetectors. The response of the two low pass photodetectors is subtracted to yield a response signal.
Portions of this invention were made with United States Government support under Grant No. DE-FG02-94ER81843 awarded by the Department of Energy, and the Government may have certain rights in the invention.