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...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.展开更多
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)+1 种基金the National "111" Project (No. B07005)the Program for Changjiang Scholars and Innovative Research Team in University,Ministry of Education (No. IRT0609)
文摘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.
