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Abnormal optical response of PAMAM dendrimer-based silver nanocomposite metamaterials
Photonics Research ( IF 7.6 ) Pub Date : 2022-03-16 , DOI: 10.1364/prj.447131
xianfeng Wu , Zhen Li , Yuan Zhao , Chaoshun Yang , Wei Zhao , X Zhao

Optical metamaterials present opportunities and challenges for manipulation of light. However, metamaterials with visible and near infrared responses are still particularly challenging to fabricate due to the complex preparation process and high loss. Here, a visible light poly(amidoamine) (PAMAM)-Ag metamaterial is prepared with the assistance of fifth-generation PAMAM (5G PAMAM), based on the dendritic structure. The large area of metamaterials, where Ag nanoparticles are spherical with diameters of 9 nm and distributed in a multilevel netlike sphere, results in broadband resonance. The negative Goos–Hänchen shift and anomalous spin Hall effect of light generated by 5G PAMAM-Ag in visible broadband are observed, and a strong slab focusing effect at 750–1050 nm is demonstrated. In addition, the simulation shows possible application of the dendritic structure in topological photonics. The results offer advances in the preparation of large-scale visible light metamaterials, showing the potential for subwavelength super-resolution imaging and quantum optical information fields.

中文翻译:

PAMAM树枝状大分子银纳米复合超材料的异常光学响应

光学超材料为光的操纵带来了机遇和挑战。然而,由于复杂的制备过程和高损耗,具有可见光和近红外响应的超材料的制造仍然特别具有挑战性。在这里,基于树枝状结构,在第五代 PAMAM(5G PAMAM)的帮助下制备了可见光聚(酰胺基胺)(PAMAM)-Ag 超材料。大面积的超材料,其中银纳米颗粒呈球形,直径为9 纳米并分布在多级网状球体中,导致宽带共振。观察到 5G PAMAM-Ag 在可见光宽带产生的光的负 Goos-Hänchen 位移和异常自旋霍尔效应,并证明了在 750-1050 nm 处的强板聚焦效应。此外,模拟显示了树枝状结构在拓扑光子学中的可能应用。该结果为大规模可见光超材料的制备提供了进展,显示了亚波长超分辨率成像和量子光学信息领域的潜力。
更新日期:2022-03-16
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