中国物理B ›› 2013, Vol. 22 ›› Issue (10): 108503-108503.doi: 10.1088/1674-1056/22/10/108503
• INTERDISCIPLINARY PHYSICS AND RELATED AREAS OF SCIENCE AND TECHNOLOGY • 上一篇 下一篇
刘少卿, 杨晓红, 刘宇, 李彬, 韩勤
Liu Shao-Qing (刘少卿), Yang Xiao-Hong (杨晓红), Liu Yu (刘宇), Li Bin (李彬), Han Qin (韩勤)
摘要: In this paper, we present the design, fabrication, and measurement of an evanescently coupled waveguide photodetector operating at 1.55 μm, which mainly comprises a diluted waveguide, a single-mode rib waveguide and a p-i-n photodiode with an extended optical matching layer. The optical characteristics of this structure are studied by using a three-dimensional finite-difference time-domain (3D FDTD) method. The photodetector exhibits a high 3-dB bandwidth of more than 35 GHz and a responsivity of 0.291 A/W at 1550 nm directly coupled with a cleaved fiber. Moreover, a linear response of more than 72-mW optical power is achieved, where a photocurrent of more than 21 mA is obtained at a reverse bias voltage of 3 V.
中图分类号: (Photodiodes; phototransistors; photoresistors)