Chinese Optics Letters, 2020, 18 (6): 061301, Published Online: May. 14, 2020  

Distributed parameter circuit model for wideband photodiodes with inductive coplanar waveguide electrodes Download: 829次

Author Affiliations
1 Beijing National Research Center for Information Science and Technology (BNRist), Department of Electronic Engineering, Tsinghua University, Beijing 100084, China
2 Center for Flexible Electronics Technology, Tsinghua University, Beijing 100084, China
3 Flexible Intelligent Optoelectronic Device and Technology Center, Institute of Flexible Electronics Technology of THU, Jiaxing 314006, China
Abstract
An equivalent circuit model including multi-section distributed parameters is proposed to analyze wideband photodiodes (PDs) with coplanar waveguide (CPW) electrodes. The model helps extract CPW parameters as well as intrinsic bandwidth parameters so that the influence of the CPW structure can be investigated, making it valuable for the design of high-performance PDs. PDs with an inductive 115 Ω impedance CPW are fabricated, and the 3 dB bandwidth is improved from 28 GHz to 37.5 GHz compared with PDs with a conventional 50 Ω impedance CPW.

Yaru Han, Bing Xiong, Changzheng Sun, Zhibiao Hao, Jian Wang, Yanjun Han, Lai Wang, Hongtao Li, Jiadong Yu, Yi Luo. Distributed parameter circuit model for wideband photodiodes with inductive coplanar waveguide electrodes[J]. Chinese Optics Letters, 2020, 18(6): 061301.

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