Non-steady-state photoelectromotive force in AlN crystal

The experimental investigation of the non-steady-state photoelectromotive force in aluminium nitride crystal is reported. The experiments are performed for two geometries, where arising photocurrent is parallel or perpendicular to the optical axis of the crystal. Dependencies of the signal amplitude versus light intensity, temporal and spatial frequencies are measured. The photoelectric parameters of the material are estimated for the light wavelength λ = 532 nm.