Distributed parameter circuit model for wideband photodiodes with inductive coplanar waveguide electrodes

Yaru Han; Bing Xiong; Changzheng Sun; Zhibiao Hao; Jian Wang; Yanjun Han; Lai Wang; Hongtao Li; Jiadong Yu; Yi Luo

doi:10.3788/COL202018.061301

Journals >Chinese Optics Letters >Volume 18 >Issue 6 >Page 061301 > Article

Chinese Optics Letters
Vol. 18, Issue 6, 061301 (2020)

Distributed parameter circuit model for wideband photodiodes with inductive coplanar waveguide electrodes

Yaru Han¹, Bing Xiong^1、2、*, Changzheng Sun^1、2, Zhibiao Hao^1、2, Jian Wang^1、2, Yanjun Han^1、2、3, Lai Wang^1、2, Hongtao Li^1、2, Jiadong Yu^1、2、3, and Yi Luo^1、2、3

Author Affiliations

¹Beijing National Research Center for Information Science and Technology (BNRist), Department of Electronic Engineering, Tsinghua University, Beijing 100084, China

²Center for Flexible Electronics Technology, Tsinghua University, Beijing 100084, China

³Flexible Intelligent Optoelectronic Device and Technology Center, Institute of Flexible Electronics Technology of THU, Jiaxing 314006, China

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DOI: 10.3788/COL202018.061301 Cite this Article Set citation alerts

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 Copy Citation Text

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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.

Keywords

high-impedance coplanar waveguide photodetector photodiodes