Large-Scale All-Dielectric Metamaterial Perfect Reflectors

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• 作者：Parikshit Moitra ; Brian A. Slovick ; Wei li ; Ivan I. Kravchencko ; Dayrl P. Briggs ; S. Krishnamurthy ; Jason Valentine
• 刊名：ACS Photonics
• 出版年：2015
• 出版时间：June 17, 2015
• 年：2015
• 卷：2
• 期：6
• 页码：692-698
• 全文大小：636K
• ISSN：2330-4022

文摘

All-dielectric metamaterials offer a potential low-loss alternative to plasmonic metamaterials at optical frequencies. Here, we take advantage of the low absorption loss as well as the simple unit cell geometry to demonstrate large-scale (centimeter-sized) all-dielectric metamaterial perfect reflectors made from silicon cylinder resonators. These perfect reflectors, operating in the telecommunications band, were fabricated using self-assembly based nanosphere lithography. In spite of the disorder originating from the self-assembly process, the average reflectance of the metamaterial perfect reflectors is 99.7% at 1530 nm, surpassing the reflectance of metallic mirrors. Moreover, the spectral separation of the electric and magnetic resonances can be chosen to achieve the required reflection bandwidth while maintaining a high tolerance to disorder. The scalability of this design could lead to new avenues of manipulating light for low-loss and large-area photonic applications.