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arXiv 2202.13877physics.optics
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低损耗自然介质中纳米尺度极化激元的负反射

Negative reflection of polaritons at the nanoscale in a low-loss natural medium

Gonzalo Alvarez-Perez, Jiahua Duan, Javier Taboada-Gutierrez, Qingdong Ou, Elizaveta Nikulina, Song Liu, James H. Edgar, Qiaoliang Bao, Vincenzo Giannini, Raine… 展开作者

Gonzalo Alvarez-Perez, Jiahua Duan, Javier Taboada-Gutierrez, Qingdong Ou, Elizaveta Nikulina, Song Liu, James H. Edgar, Qiaoliang Bao, Vincenzo Giannini, Rainer Hillenbrand, J. Martin-Sanchez, Alexey Y. Nikitin, Pablo Alonso-Gonzalez

摘要:

负反射发生在当光被反射向其入射的边界的法线的同一侧时。这种奇特的光学现象为光的操纵提供了一条新的途径,不仅在真实空间中尚未可视化,而且在纳米尺度和自然介质中基本上都未被探索。在这里,我们直接可视化纳米尺度限制的极化激元负反射在低损耗的范德华晶体中制造的亚波长镜。我们的近场纳米成像结果揭示了负反射时极化激元波长和传播方向的非常规和广泛的可调谐性。基于这些发现,我们介绍了一种新的纳米光学器件:双曲纳米谐振器,其中具有不同动量的双曲极化激元反射回一个共同的点源,增强其强度。这些结果为在低损耗自然介质中实现纳米光子学铺平了道路,提供了一种新颖有效的途径来限制和控制纳米级的光流动,这是未来光学芯片纳米技术的关键。

英文摘要:

Negative reflection occurs when light is reflected towards the same side of the normal to the boundary from which it is incident. This exotic optical phenomenon, which provides a new avenue towards light manipulation, is not only yet to be visualized in real space but remains largely unexplored both at the nanoscale and in natural media. Here, we directly visualize nanoscale-confined polaritons negatively reflecting on subwavelength mirrors fabricated in a low-loss van der Waals crystal. Our near-field nanoimaging results unveil an unconventional and broad tunability of both the polaritonic wavelength and direction of propagation upon negative reflection. Based on these findings, we introduce a novel device in nano-optics: a hyperbolic nanoresonator, in which hyperbolic polaritons with different momenta reflect back to a common point source, enhancing its intensity. These results pave the way to realize nanophotonics in low-loss natural media, providing a novel and efficient route to confine and control the flow of light at the nanoscale, key for future optical on-chip nanotechnologies.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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