Abstract 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.
Received: 01 July 2008
Revised: 30 December 2008
Accepted manuscript online:
PACS:
85.60.Gz
(Photodetectors (including infrared and CCD detectors))
(Optoelectronic device characterization, design, and modeling)
Fund: Project
supported by the Major State Basic Research Program of China (Grant
No 2006CB302802).
Cite this article:
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) Characteristic analysis of the optical delay in frequency response of resonant cavity enhanced (RCE) photodetectors 2009 Chin. Phys. B 18 2223
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