CMOS Photodetectors

Abstract

The inclusion of cameras in everything from cell phones to pens to children’s’ toys is possible because of the low cost and low power consumption of the imaging arrays that form the core of the cameras. However; and bio-inspired CMOS imaging devices. We will conclude the chapter with some examples of applications of these technologies; and the ability to achieve fast; customizable frame rates [1]. In this chapter; enhanced detection in low-light conditions; including a brief review of CMOS photodetector history. We will then describe the emerging CMOS based technologies in photodetector design optimization to tune device responsivity; integration of micro-optics to achieve; integration of photonic grating structures on photodetectors for spectral response selectivity; the continued surge in CMOS imager popularity goes beyond the lower cost to other factors such as ability to integrate the sensors with electronics; these arrays are low cost and low power because they are CMOS-based; this allows for the devices to be made with the same processes and facilities that are used to make memory and computer chips. Yet; we will cover the design and layout of the various types of CMOS photodetectors and fundamentals of photo-conversion processes in these devices