Authors: L. Forbes, M.Y. Louie
Affilation: Oregon State University, United States
Pages: 9 - 12
Keywords: texturing, silicon, near infrared, photodetectors
When the silicon is not strongly absorbing in the near infrared a back side textured surface works in conjunction with a totally internally reflecting front side surface to best increase the absorption of near infrared photons. This results in multiple internal reflections and light trapping. This paper describes a simple analysis technique and design considerations in the use of backside texturing to improve the near infrared(IR) response of silicon photodiodes, photodetectors, solar cells and imagers. A large enhancement in the near infrared responsivity of silicon photodetectors can be achieved.