Research on PIN Photodetector with Novel Low-Loss Electrode
WEI Jian
NIU Huijuan
CHEN Qingtao
LI Yuanhao
LIU Kai
DUAN Xiaofeng
HUANG Yongqing
Abstract：In this paper,a low-loss electrode is designed and optimized based on a PIN photodetector with a micro-pore and slot structure.This method not only provides an effective solution for the experimental preparation of low-loss electrodes,but also further improves the 3 dB bandwidth of the photodetector.Firstly,by optimizing the electrode substrate and thickness,introducing insulation layer,adding metal material and adding rectangular groove structure in the substrate,a new type of low-loss photodetector e-lectrode is designed,and its transmission loss is reduced to-1.15 dB.Then,the new electrode and the e-quivalent circuit of the PIN photodetector are designed and optimized.The results show that the 3 dB bandwidth of the photodetector is improved by nearly 32％compared with the non-use of the new elec-trode.The new electrode can be used as a reference for improving the performance of optical detectors with different structures and different bands.
Keywords：photodetectorlow-loss electrodejoint optimization3 dB bandwidthtransmission loss
Publication Date：2025-02-27
Online Publishing Date：2026-08-28(First online date of this platform, not the publication date of the document)
Pages：11( 23-33 )