Light detector, light detecting system, rider device, method of manufacturing vehicle and photodetector

摘要

To provide a photodetector with improved photoelectric conversion efficiency.SOLUTION: A photodetector according to an embodiment includes a first semiconductor layer 40 and a second semiconductor layer 5 provided on the first semiconductor layer 40 and detecting light, and the first semiconductor layer 40 includes a cavity portion 1 that reflects incident light to the second semiconductor layer 5 and the cross section of the cavity portion 1 including a first direction from the first semiconductor layer 40 to the second semiconductor layer 5 and a second direction crossing the first direction has a rhombus shape.SELECTED DRAWING: Figure 1