Ultra-wideband perfect reflection and tunneling by all-dielectric metamaterials
Ultra-wideband perfect reflection and tunneling by all-dielectric metamaterials
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全电介质超材料的超宽带完美反射和隧道
DOI：
10.1364/ol.417435
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发表时间：
2021-02-15
期刊：
影响因子：
3.6
通讯作者：
Zhu, Jinfeng
中科院分区：
文献类型：
--
作者：
Qiu, Jinlin;Liu, Xueying;Zhu, Jinfeng
全介质超材料是一种很有前途的低损耗替代等离子体超材料的近红外完美反射，但工作带宽仍然有限。在这里，我们提出了一种超宽带全介质超材料完美反射器，具有紧凑的结构，包括亚波长高折射率光栅，连接层，和多层堆叠。这种完美的反射器结合了四分之一波长设计和谐振漏模的优点，并且在横向磁波的垂直入射下覆盖了从966到2203 nm的极宽波长范围。通过设计连接层，可以利用光透射的超窄带隧穿来分裂反射带。这些成就表明全介电超材料作为超宽带反射器在光学器件和系统中广泛应用的广阔潜力。(C)2021美国光学学会
All-dielectric metamaterials are a promising low-loss alternative to plasmonic metamaterials for near-infrared perfect reflection, but the working bandwidth is still limited. Here we propose an ultra-wideband all-dielectric metamaterial perfect reflector that has a compact structure consisting of the subwavelength high-index grating, connection layer, and multilayer stack. Such a perfect reflector combines the advantages of quarter-wave design and resonant leaky mode, and covers an extremely wide wavelength range from 966 to 2203 nm under the normal incidence of transverse magnetic wave. By engineering the connection layer, the reflection band can be split with an ultra-narrowband tunneling of light transmission. These achievements demonstrate the promising potential of all-dielectric metamaterials as ultra-wideband reflectors for extensive applications in optical devices and systems. (C) 2021 Optical Society of America