Unidirectional transmission of optical waveguides in optical communication bands based on the valley Hall effect
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Aichun Yang
Abstract
Unidirectional transmission of optical waveguides in optical communication bands has been a difficult problem in the field of optical communication. In this paper, the valley Hall effect is utilized to enhance the transmission efficiency of optical wave in optical communication system. Valley photonic crystal is selected as the main material of optical waveguide in optical communication band. Valley photonic crystal is composed of air columns periodically arranged according to the honeycomb lattice in the dielectric material, which shows the valley Hall topological effect in transverse electric wave mode. By introducing the energy valley degree of freedom into the photonic crystal, the light wave is transmitted locally on the dielectric material at the interface, and the control of the dielectric material realizes the regulation of light transmission. The Chern number of optical waveguide topology in the optical communication band, the exchange phenomenon occurs at the same energy band position and realizes efficient unidirectional transmission of optical waveguides in optical communication bands. The experimental results show that the optical communication band optical waveguide based on the valley Hall effect has unique unidirectional transmission characteristics and robustness to cornering and is capable of realizing unidirectional optical transmission in optical communication systems.
Funding source: the Project for the research fundamental abilities improvement of Young and Middle-aged Teachers in Guangxi Higher Education institutions
Award Identifier / Grant number: 2024KY1115
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Research ethics: Not applicable.
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Author contributions: The authors have accepted responsibility for the entire content of this manuscript and approved its submission.
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Competing interests: The authors state no conflict of interest.
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Research funding: The study was supported by “the Project for the research fundamental abilities improvement of Young and Middle-aged Teachers in Guangxi Higher Education institutions (Grant No. 2024KY1115).”
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Data availability: Not applicable.
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