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- W4283157788 abstract "Smith–Purcell radiation (SPR) is a phenomenon in that free electrons moving above a periodic structure deliver a part of their kinetic energies to electromagnetic waves. It plays an important role in the development of radiation sources and beam diagnosis. With the development of nanofabrication technology, various complex micro‐nano‐metallic periodic or aperiodic structures have been adopted to improve the efficiency and coherence of SPR. In general, when free electrons move above the metallic periodic structure, the localized surface wave and Smith–Purcell radiation wave are excited simultaneously. As the frequency of the surface wave is always lower than the threshold of Smith–Purcell radiation, the surface wave cannot be radiated. Here, the surface wave is transformed into SPR by using a novel composite subwavelength hole array, thus the SPR is enhanced and it becomes coherent and easy to tune. This work provides a competitive approach to achieve a coherent and high‐efficiency THz radiation source." @default.
- W4283157788 created "2022-06-21" @default.
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- W4283157788 date "2022-06-19" @default.
- W4283157788 modified "2023-10-16" @default.
- W4283157788 title "The Transformation from Surface Wave into Radiation Wave Using Composite Subwavelength Holes Array" @default.
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- W4283157788 doi "https://doi.org/10.1002/adpr.202100358" @default.
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