摘要
A novel resonant cavity enhanced(RCE) photodetector with flat-top and steep-edge response is presented.The response is obtained by designing a gradient-thickness P area in the absorption cavity.Simulation results show that the maximum and minimum values of the quantum efficiency in bandpass are 85.242% and 87.564% respectively,the ripple is about 3.6%,and 0.5 dB,3 dB and 20 dB bandwidths are 0.3 nm,0.4 nm and 1.2 nm,respectively.The mesa area is 10 μm×10 μm and the frequency response bandwidth is 87 GHz.Compared with similar photodetectors,this photodetector has high quantum efficiency,narrow spectral response linewidth,good flat-top and steep-edge response and ideal high-speed characteristics.
A novel resonant cavity enhanced（RCE） photodetector with flat-top and steep-edge response is presented.The response is obtained by designing a gradient-thickness P area in the absorption cavity.Simulation results show that the maximum and minimum values of the quantum efficiency in bandpass are 85.242% and 87.564% respectively,the ripple is about 3.6%,and 0.5 dB,3 dB and 20 dB bandwidths are 0.3 nm,0.4 nm and 1.2 nm,respectively.The mesa area is 10 μm×10 μm and the frequency response bandwidth is 87 GHz.Compared with similar photodetectors,this photodetector has high quantum efficiency,narrow spectral response linewidth,good flat-top and steep-edge response and ideal high-speed characteristics.
基金
supported by the National High Technology Research and Development Program of China (No. 2007AA03Z418)
the Programof Key International Science and Technology Cooperation Projects (No. 2006DFB11110)
the National "111" Project (No. B07005)
the Program for Changjiang Scholars and Innovative Research Team in University,Ministry of Education (No. IRT0609)
