Topology Optimization of Low-Loss Z-Bend 2D Photonic Crystal Waveguide

In this article, we design a low-loss, high-bandwidth Z-bend photonic silicon crystal waveguide bending in a triangular lattice through topology optimization. Based on the topological optimization method, we change the relative position of air holes in the global scope to maximize the transmittance...

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Published in:Photonics 2023-02, Vol.10 (2), p.202
Main Authors: Liu, Gang, Wang, Fei, Gao, Yongpan, Jia, Baonan, Guan, Xiaoning, Lu, Pengfei, Song, Haizhi
Format: Article
Language:English
Subjects:
Bandwidths
Crystal lattices
Crystals
Design
Electric fields
Light
Mathematical programming
Optimization
photonic crystal
Photonic crystals
Point defects
Propagation
Simulation
Topology
Topology optimization
transmission bandwidth
transmission loss
Waveguides
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cited_by cdi_FETCH-LOGICAL-c421t-452e373843061811c2964e9b4fd4050832f065bbd8ba8e44e691c06874347bcc3
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container_issue 2
container_start_page 202
container_title Photonics
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creator Liu, Gang
Wang, Fei
Gao, Yongpan
Jia, Baonan
Guan, Xiaoning
Lu, Pengfei
Song, Haizhi
description In this article, we design a low-loss, high-bandwidth Z-bend photonic silicon crystal waveguide bending in a triangular lattice through topology optimization. Based on the topological optimization method, we change the relative position of air holes in the global scope to maximize the transmittance and bandwidth of the waveguide. The simulation results indicate that the transmission characteristics can be effectively improved with our method. After the optimization, the loss of the waveguide can be reduced to −5 dB and the bandwidth can increase to 160 nm. Our research has great significance for further optimizing the propagation of light in photonic crystals.
doi_str_mv 10.3390/photonics10020202
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subjects Bandwidths
Crystal lattices
Crystals
Design
Electric fields
Light
Mathematical programming
Optimization
photonic crystal
Photonic crystals
Point defects
Propagation
Simulation
Topology
Topology optimization
transmission bandwidth
transmission loss
Waveguides
title Topology Optimization of Low-Loss Z-Bend 2D Photonic Crystal Waveguide
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