Analysis of photonic crystals using the hybrid finite-element/finite-difference time domain technique based on the discontinuous Galerkin method

2012 ◽  
Vol 92 (5) ◽  
pp. 495-506 ◽  
Author(s):  
Bao Zhu ◽  
Jiefu Chen ◽  
Wanxie Zhong ◽  
Qing Huo Liu
Keyword(s):  
Finite Element ◽  
Finite Difference ◽  
Photonic Crystals ◽  
Galerkin Method ◽  
Discontinuous Galerkin ◽  
Discontinuous Galerkin Method ◽  
Time Domain ◽  
Finite Difference Time Domain ◽  
Hybrid Finite Element ◽  
Difference Time

Research on the transmission coefficient of plasma photonic crystals based on the ICCG–SFDTD method

2015 ◽  
Vol 29 (12) ◽  
pp. 1550052 ◽  
Author(s):  
Ying-Jie Gao ◽  
Hong-Wei Yang ◽  
Rui Weng ◽  
Qing-Xia Niu ◽  
Yu-Jie Liu ◽  
...  
Keyword(s):  
Finite Difference ◽  
Photonic Crystals ◽  
Transmission Coefficient ◽  
Time Domain ◽  
Finite Difference Time Domain ◽  
Sparse Matrix ◽  
Fdtd Method ◽  
Computational Time ◽  
Plasma Photonic Crystals ◽  
Difference Time

Compared with the traditional finite-difference time-domain (FDTD) method, the symplectic finite-difference time-domain (SFDTD) method has the characteristics of high precision and low dispersion. However, because the higher-order difference is necessary for the calculation, a large sparse matrix is generated. It causes that the computational time is relatively long and the memory is more. To solve this problem, the incomplete Cholesky conjugate gradient (ICCG) method for solving the large sparse matrix needs to be taken into the SFDTD differential equations. The ICCG method can accelerate the iterations of the numerical calculation and reduce the memory with fast and stable convergence speed. The new ICCG–SFDTD method, which has both the advantages of the ICCG method and SFDTD method, is proposed. In this paper, the ICCG–SFDTD method is used for research on the characteristic parameters of the plasma photonic crystals (PPCs) under different conditions, such as the reflection electric field and the transmission coefficient, to verify the feasibility and accuracy of this method. The results prove that the ICCG–SFDTD method is accurate and has some advantages.

Tandem Solar Cells Efficiency Prediction and Optimization via Deep Learning

2020 ◽  
Author(s):  
Chuqiao Yi ◽  
Yuliang Wu ◽  
Yayu Gao ◽  
Qingguo Du
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Deep Learning ◽  
Finite Difference ◽  
Time Domain ◽  
Finite Difference Time Domain ◽  
Electronic Devices ◽  
Optical Design ◽  
Tandem Solar Cells ◽  
Difference Time

Optical design plays an important role to improve the performance of opto-electronic devices. However, conventional design process with finite difference time domain (FDTD) or finite element method is usually time...

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