Author:
Liou Juin Jie,Hsiao Hao-Tse,Yao I-Cheng,Jheng Jia-Syun,Lin Chu-Hsuan
Abstract
We have tried to improve the responsivity of germanium-based thin-film photodetectors. It has been shown that applying a mechanical strain to the detector led to a 46.6% enhancement on the 1550 nm detection. This improvement is better than the 1310 nm case, because the bandgap shrinkage is more beneficial to the small-energy photon detection. The AuNP coating is even more attractive for responsivity enhancement of thin-film germanium (Ge) detectors. The responsivity enhancement due to the AuNP deposition is as high as 89% and 47%, for the 1310 nm and 1550 nm detections, respectively. To the best of our knowledge, this is the best responsivity enhancement for the thin-film Ge detectors reported to date.
Funder
Ministry of Science and Technology
Subject
Materials Chemistry,Surfaces, Coatings and Films,Surfaces and Interfaces