Splitter engineering through optimizing topological adiababtic passage  

作　　者：Jia-Ning Zhang Jin-Lei Wu Cheng Lv Jiabao Yao Jie Song Yong-Yuan Jiang 

机构地区：[1]School of Physics,Harbin Institute of Technology,Harbin 150001,China [2]School of Physics,Zhengzhou University,Zhengzhou 450001,China [3]Collaborative Innovation Center of Extreme Optics,Shanxi University,Taiyuan 030006,China [4]Key Laboratory of Micro-Nano Optoelectronic Information System,Ministry of Industry and Information Technology,Harbin 150001,China [5]Key Laboratory of Micro-Optics and Photonic Technology of Heilongjiang Province,Harbin Institute of Technology,Harbin 150001,China

出　　处：《Frontiers of physics》2025年第1期145-163,共19页物理学前沿(英文版)

基　　金：support by the National Natural Science Foundation of China(Grant Nos.62075048 and 12304407);China Postdoctoral Science Foundation(Grant Nos.2023TQ0310 and GZC20232446).

摘　　要：Topologically protected states are important in realizing robust optical behaviors that are quite insensitive to local defects or perturbations,which provide a promising solution for robust photonic integrations.Here,we propose to implement fast topological beam splitters and routers via the adiabatic passage of edge and interface states in the cross-linking configuration of Su-Schrieffer-Heeger(SSH)chains with interface defects.The channel state does not immerse into the band continuum during the adiabatic cycle,making the adiabatic restriction less stringent and the transport process more efficient.Based on the accelerated topological pumping,the beam splitters and routers exhibit improved robustness against losses of the system yet degraded resilience to fluctuation of coupling strengths and on-site energies compared with the conventional topological splitting and routing schemes.In addition,we confirm that the model demonstrates good scalability when the system size is varied.The simulation results of topological beam splitting in coupled waveguide arrays are in good consistency with theoretical analysis.This topological design provides a robust way to control photons,which may suggest further application of topological devices with unique properties and functionalities for integrated photonics.

关 键 词：topological effects in photonic systems Su-Schrieffer-Heeger topological photonics WAVEGUIDES 

分 类 号：TN2[电子电信—物理电子学]