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Nanoscale Artificial Plasmonic Lattice in Self‐Assembled Vertically Aligned Nitride–Metal Hybrid Metamaterials
Advanced Science ( IF 15.1 ) Pub Date : 27 April 2 , DOI: 10.1002/advs.201800416
Jijie Huang 1 , Xuejing Wang 1 , Nicki L. Hogan 2 , Shengxiang Wu 2 , Ping Lu 3 , Zhe Fan 1 , Yaomin Dai 4 , Beibei Zeng 4 , Ryan Starko‐Bowes 5 , Jie Jian 1 , Han Wang 1 , Leigang Li 1 , Rohit P. Prasankumar 4 , Dmitry Yarotski 4 , Matthew Sheldon 2 , Hou‐Tong Chen 4 , Zubin Jacob 5 , Xinghang Zhang 1 , Haiyan Wang 1, 5
Affiliation  

Nanoscale metamaterials exhibit extraordinary optical properties and are proposed for various technological applications. Here, a new class of novel nanoscale two‐phase hybrid metamaterials is achieved by combining two major classes of traditional plasmonic materials, metals (e.g., Au) and transition metal nitrides (e.g., TaN, TiN, and ZrN) in an epitaxial thin film form via the vertically aligned nanocomposite platform. By properly controlling the nucleation of the two phases, the nanoscale artificial plasmonic lattices (APLs) consisting of highly ordered hexagonal close packed Au nanopillars in a TaN matrix are demonstrated. More specifically, uniform Au nanopillars with an average diameter of 3 nm are embedded in epitaxial TaN platform and thus form highly 3D ordered APL nanoscale metamaterials. Novel optical properties include highly anisotropic reflectance, obvious nonlinear optical properties indicating inversion symmetry breaking of the hybrid material, large permittivity tuning and negative permittivity response over a broad wavelength regime, and superior mechanical strength and ductility. The study demonstrates the novelty of the new hybrid plasmonic scheme with great potentials in versatile material selection, and, tunable APL spacing and pillar dimension, all important steps toward future designable hybrid plasmonic materials.

中文翻译:

自组装垂直排列的氮化物-金属杂化超材料中的纳米级人工等离子晶格。

纳米级超材料展现出非凡的光学性能,并被提议用于各种技术应用。在这里,通过在外延薄膜中结合两大类传统的等离子体材料,金属(例如Au)和过渡金属氮化物(例如TaN,TiN和ZrN)来实现一类新型的新型纳米级两相混合超材料。通过垂直排列的纳米复合材料平台形成。通过适当地控制两相的成核,展示了由TaN基质中高度有序的六方密堆积Au纳米柱组成的纳米级人工等离晶格(APL)。更具体地说,将平均直径为3 nm的均匀Au纳米柱嵌入外延TaN平台中,从而形成高度3D有序的APL纳米级超材料。新颖的光学特性包括高度各向异性的反射率,明显的非线性光学特性(表明混合材料的反对称性破坏),宽介电常数调谐和在宽波长范围内的负介电常数响应以及出色的机械强度和延展性。这项研究证明了新型混合等离子体方案的新颖性,在新型材料选择方面具有巨大潜力,可调节的APL间距和支柱尺寸是迈向未来可设计的混合等离子体材料的所有重要步骤。
更新日期:2018-07-14
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