Solar-blind deep-ultraviolet (DUV) photoconductive detectors based on an (LAO) single crystal with interdigitated electrodes are reported. The LAO detectors show a high sensitivity to DUV light with wavelengths less than , and the DUV/UV (200 versus ) contrast ratio is more than 2 orders of magnitude. The photocurrent responsivity of LAO detector reaches at at bias, and the corresponding quantum efficiency η is 44.6%. The noise current under sunlight at midday outdoors is only . The experimental results indicate that the LAO detectors have attractive potential applications in DUV detection.
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