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Optimization of the All‐Optical Switching Constructed from Photonic Bandgap Network
Author(s) -
Tang Xiaopeng,
Yang Xiangbo,
Tang Yan,
Wu Huizhou,
Deng Dongmei,
Liu Hongzhan,
Wei Zhongchao
Publication year - 2020
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.201900702
Subject(s) - optical switch , band gap , photonics , realization (probability) , eigenfunction , photonic crystal , waveguide , power (physics) , materials science , nonlinear system , refractive index , photonic bandgap , optical burst switching , optics , optoelectronics , mathematics , optical performance monitoring , physics , eigenvalues and eigenvectors , wavelength division multiplexing , quantum mechanics , wavelength , statistics
Herein, the optimization of the all‐optical switching constructed from photonic bandgap (PBG) network is studied and numerically calculate the switching performance indices using network equation and generalized eigenfunction methods. The optimization of the all‐optical switching is discussed in depth from three aspects: the length ratio of waveguide segments, the number of nonlinear material defects, and the difference between the refractive index of the linear and that of the nonlinear material. After optimization, the ultralow threshold control energy/power decreases to 1.12 × 10 − 29 J / 8.9 × 10 − 11 GW m − 2, which is eight orders of magnitude smaller than the best reported result. Also, the ultrahigh switching efficiency exceeds 1.04 × 10 26 , which is 15 orders of magnitude larger than that reported in the previous works. The switching time and feature size can also reach the level of the best reported results. It may provide a new way for the optimization of all‐optical switching structure and accelerates the realization of practical all‐optical switching.