Gourd-shaped hole array germanium (Ge)-on-insulator photodiodes with improved responsivity and specific detectivity at 1,550 nm

• Main Authors: Son, Bongkwon, Zhou, Hao, Lin, Yiding, Lee, Kwang Hong, Tan, Chuan Seng
• Other Authors: School of Electrical and Electronic Engineering
• Format: Article
• Language: English
• Published: 2021
• Subjects: Engineering::Electrical and electronic engineering::Semiconductors; Germanium; Photodetector
• Online Access: https://hdl.handle.net/10356/148841
• Institution: Nanyang Technological University

Gourd-shaped hole array germanium (Ge) vertical p-i-n photodiodes on a germanium-on-insulator (GOI) substrate were designed and demonstrated with excellent responsivity and specific detectivity of 0.74 A/W and 3.1 × 10^10 cm·Hz^1/2/W, respectively, at the wavelength of 1,550 nm. The responsivity is...