论文标题
基于连续体的结合状态刺激史密斯 - 佩尔赛发射
Stimulated Smith-Purcell emission based on bound states in the continuum
论文作者
论文摘要
连续体中结合状态的发展的最新进展为调整电子波相互作用的新策略提供了新的策略，从而控制了电子引起的发射。在本文中，我们调查了使用单个开放式光栅产生刺激的史密斯纯发射的设计。该方案利用了连续体的结合状态附近的强辐射共振，从而实现了在逃生波发生下的亚波长度光栅的多个衍射顺序的惊人增强。连续电子束与辐射谐振模式之间的相互作用堆积了电子，从而导致连贯的振荡，从而刺激了史密斯 - 纯核辐射。还允许使用较高的衍射顺序来实现史密斯 - 细胞辐射，与低能电子的相干辐射也可以使用。具有两个传播空间谐波的辐射模式的相互作用可激发两个不同方向的辐射。这项工作为紧凑的相干辐射源铺平了道路，该辐射源可能会在通信，物理学和生物学中找到应用。
Recent advances in the development of bound states in the continuum offer new strategies to tailor electron-wave interaction and hence control the electron-induced emission. In this article we investigate the design to produce stimulated Smith-Purcell emission with a single open grating. This scheme exploits a strong radiative resonance near a bound state in the continuum, enabling staggering enhancements of multiple diffraction orders of a subwavelength grating under evanescent wave incidence. The interaction between a continuous electron beam and the radiative resonant mode bunches electrons, resulting in coherent oscillation and consequently stimulated Smith-Purcell radiation. Using a higher diffraction order for Smith-Purcell radiation, coherent radiation with low-energy electrons is also allowed. The interaction with a radiative mode that has two propagating space harmonics enables stimulated radiation towards two different directions. This work paves the way to a compact coherent radiation source, which may find application in communications, physics, and biology.
