The spatially modulated light detector

Summary form only given. We present a novel detector for high-speed light detection in standard complementary metal-oxide semiconductor (CMOS). The device consists of a substrate wherein the light being absorbed is spatially modulated thereby creating a signal with a spatially modulated component in that substrate. A shadow mask spatially modulates the incident, and consequently, the absorbed light. By measuring the magnitude of the spatial frequency component in the minority carrier distribution, a fast detector is conceived.