中国物理B ›› 2009, Vol. 18 ›› Issue (6): 2223-2228.doi: 10.1088/1674-1056/18/6/020
郭剑川, 左玉华, 张云, 丁武昌, 成步文, 余金中, 王启明
Guo Jian-Chuan(郭剑川)†, Zuo Yu-Hua(左玉华), Zhang Yun(张云), Ding Wu-Chang(丁武昌), Cheng Bu-Wen(成步文), Yu Jin-Zhong(余金中), and Wang Qi-Ming(王启明)
摘要: With consideration of the modulation frequency of the input lightwave itself, we present a new model to calculate the quantum efficiency of RCE p-i-n photodetectors (PD) by superimposition of multiple reflected lightwaves. For the first time, the optical delay, another important factor limiting the electrical bandwidth of RCE p-i-n PD excluding the transit time of the carriers and RCd response of the photodetector, is analyzed and discussed in detail. The optical delay dominates the bandwidth of RCE p-i-n PD when its active layer is thinner than several 10~nm. These three limiting factors must be considered exactly for design of ultra-high-speed RCE p-i-n PD.
中图分类号: (Photodetectors (including infrared and CCD detectors))