GaN-Based Linear Array of Ultraviolet Detectors

A recently developed gallium nitride-based linear array of ultraviolet detectors is blind to most of the visible spectrum, with a cutoff wavelength of 370 nm. This device is a prototype of GaN detector arrays for ultraviolet-light imaging in the presence of significant visible radiation, without need for extensive baffling to suppress stray light or for costly filters to block visible light. The volume, weight, and power consumption of this GaN detector array is an order of magnitude below those of comparable photomultiplier tubes and microchannel plates now used to detect ultraviolet light. This GaN detector array also operates at lower voltage. Moreover, GaN is rugged, and the fabrication of detectors from GaN is relatively easy.