论文标题
多功能非本地跨额叶
Multifunctional Nonlocal Metasurfaces
论文作者
论文摘要
衍射光子设备通过局部和非局部光学模式操纵光。局部设备（例如元信息）可以在多个选定的波长下塑造波前，但不可避免地会在整个光谱上修改光。非局部设备（例如光栅过滤器）具有很高的频率选择性，但空间控制有限。在这里，我们在连续体中使用准结合状态引入了一个合理的设计范式，以实现多功能的非局部设备：在多个选定的波长处产生窄带空间定制的狭窄的波长，却是透明的。
Diffractive photonic devices manipulate light via local and nonlocal optical modes. Local devices, such as metasurfaces, can shape a wavefront at multiple selected wavelengths, but inevitably modify light across the spectrum; nonlocal devices, such as grating filters, offer great frequency selectivity but limited spatial control. Here, we introduce a rational design paradigm using quasi-bound states in the continuum to realize multifunctional nonlocal devices: metasurfaces that produce narrowband spatially tailored wavefronts at multiple selected wavelengths and yet are otherwise transparent.
