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Design and optimization of evanescently coupled waveguide photodiodes |
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| Authors: | Yao Chen Cheng Yuanbing Wu Jian Xu Kun Qiu Jifang Zhao Lingjuan Wang Wei Lin Jintong |
| Affiliation: | 1. Key Laboratory of Information Photonics and Optical Communications, Ministry of Education, Beijing University of Posts and Telecommunications, Beijing 100876, China 2. Key Laboratory of Semiconductor Materials Science, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, China |
| Abstract: | We present the design and optimization of evanescently coupled waveguide photodiodes(EC-WPDs) based on the coupling modes theory and the beam propagation method.Efficient focalization of the optical power in the absorber is achieved by an appropriate choice of index matching layers of EC-WPDs.Numerical simulation shows that high-speed(40 GHz),high quantum efficiency(81%) and high linearity photodiodes can be achieved, and EC-WPDs are promising devices for future optical communication systems. |
| Keywords: | photodiode coupling modes theory beam propagation method |
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