首页|Highly efficient conversion from classical guided waves to topological chiral edge states
Highly efficient conversion from classical guided waves to topological chiral edge states
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Electromagnetic topological chiral edge states mimicking the quantum Hall effect have attracted a great deal of attention due to their unique features of free backscattering and immunity against sharp bends and defects.However,the matching techniques between classical waveguides and the topological one-way waveguide deserve more attention for real-world applications.In this paper,a highly efficient conversion structure between a classical rectangular waveguide and a topo-logical one-way waveguide is proposed and demonstrated at the microwave frequency,which efficiently converts classical guided waves to topological one-way edge states.A tapered transition is designed to match both the momentum and impedance of the classical guided waves and the topological one-way edge states.With the conversion structure,the waves generated by a point excitation source can be coupled to the topological one-way waveguide with very high coupling effi-ciency,which can ensure high transmission of the whole system[i.e.,from the source and the receiver].Simulation and measurement results demonstrate the proposed method.This investigation is beneficial to the applications of topological one-way waveguides and opens up a new avenue for advanced topological and classical integrated functional devices and systems.
guided waveshighly efficient conversionphotonic crystalstopological chiral edge states
韩建飞、梁锋、赵玉林、丁霄、汪相如、赵德双、王秉中
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School of Physics,University of Electronic Science and Technology of China,Chengdu 611731,China
School of Optoelectronic Science and Engineering,University of Electronic Science and Technology of China,Chengdu 611731,China
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