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    Researchers develop compact superradiant Smith-Purcell device with ultra-narrow linewidth

    1 week ago

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    Superradiant Smith-Purcell radiation (S-SPR) is a kind of free electron radiation with a train of free electron bunches passing over a periodic grating. In theory, the ultra-narrow spectral linewidth of S-SPR could be realized, which would be greatly beneficial to various applications such as imaging, sensing and communication.
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