Characteristics of a uni-traveling-carrier photodiode （UTC-PD） are investigated. A hydro-dynamic model is introduced which takes into account the electrons＇ velocity overshoot in the depletion region, which is a mo...Characteristics of a uni-traveling-carrier photodiode （UTC-PD） are investigated. A hydro-dynamic model is introduced which takes into account the electrons＇ velocity overshoot in the depletion region, which is a more accurate high speed device than using the normal drift-diffuse model. Based on previous results, two modified UTC-PDs are presented, and an optimized device is obtained, the bandwidth of which is more than twice that of the original.展开更多
The effects of the multimode diluted waveguide on quantum efficiency and saturation behavior of the evanescently coupled uni-traveling carrier （UTC） photodiode structures are reported. Two kinds of evanescently coup...The effects of the multimode diluted waveguide on quantum efficiency and saturation behavior of the evanescently coupled uni-traveling carrier （UTC） photodiode structures are reported. Two kinds of evanescently coupled uni-traveling carrier photodiodes （EC-UTC-PD） were designed and characterized： one is a conventional EC-UTC-PD structure with a multimode diluted waveguide integrated with a UTC-PD; and the other is a compact EC-UTC-PD structure which fused the multimode diluted waveguide and the UTC-PD structure together. The effect of the absorption behavior of the photodiodes on the efficiency and saturation characteristics of the EC-UTC-PDs is analyzed using 3-D beam propagation method, and the results indicate that both the responsivity and saturation power of the compact EC-UTC-PD structures can be further improved by incorporating an optimized compact multimode diluted waveguide.展开更多
基金The Joint Laboratory of Quantum Optoelectronics and the Theory of Bivergentum and Beijing International Scientific and Technological Cooperation Base of Information Optoelectronics and Nanoheterogeneous Structure,the National Natural and Science Foundation of China(Nos.61574019,61674018,61674020)the Fund of the State Key Laboratory of Information Photonics and Optical Communications,the Specialized Research Fund for the Doctoral Program of Higher Education of China(No.20130005130001)
基金Project supported by the National Natural Science Foundation of China(No.60736002)the National High Technology Research and Development Program of China(No.2007AA03Z408)
文摘Characteristics of a uni-traveling-carrier photodiode （UTC-PD） are investigated. A hydro-dynamic model is introduced which takes into account the electrons＇ velocity overshoot in the depletion region, which is a more accurate high speed device than using the normal drift-diffuse model. Based on previous results, two modified UTC-PDs are presented, and an optimized device is obtained, the bandwidth of which is more than twice that of the original.
基金supported by the National High Technology Research and Development Program of China (Nos. 2006AA01Z256, 2007AA03Z419,2007AA03Z417)the State Key Development Program for Basic Research of China (Nos. 2006CB604901,2006CB604902)the Nati-onal Natural Science Foundation of China (Nos. 90401025,60736036,60706009, 60777021)
文摘The effects of the multimode diluted waveguide on quantum efficiency and saturation behavior of the evanescently coupled uni-traveling carrier （UTC） photodiode structures are reported. Two kinds of evanescently coupled uni-traveling carrier photodiodes （EC-UTC-PD） were designed and characterized： one is a conventional EC-UTC-PD structure with a multimode diluted waveguide integrated with a UTC-PD; and the other is a compact EC-UTC-PD structure which fused the multimode diluted waveguide and the UTC-PD structure together. The effect of the absorption behavior of the photodiodes on the efficiency and saturation characteristics of the EC-UTC-PDs is analyzed using 3-D beam propagation method, and the results indicate that both the responsivity and saturation power of the compact EC-UTC-PD structures can be further improved by incorporating an optimized compact multimode diluted waveguide.
