Fully transparent gallium nitride/indium gallium nitride LED as a position sensitive detector

There is a need in commercial imaging technologies for an accurate, solar blind, in-situ beam locator to ensure laser alignment during operation. In this work, fully transparent gallium nitride LED is fabricated and characterized as a two-dimensional position sensitive detector (PSD). Fabricated devices are shown to successfully and repeatably locate 405 nm laser light in two dimensions in the PSD area. These devices then can provide real time spatial light information in advanced imaging technologies for ensuring accurate laser alignment without affecting the system’s operation.