Reduced reflection from roughened hyperbolic metamaterial

Evgenii E. Narimanov, Birck Nanotechnology Center, Purdue University
H. Li, Norfolk State University
Yu A. Barnakov, Norfolk State University
T. U. Tumkur, Norfolk State University
M. A. Noginov, Norfolk State University

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We show that roughened surfaces of hyperbolic metamaterials scatter light preferentially inside the media, resulting in a very low reflectance. This phenomenon of fundamental importance, demonstrated experimentally in arrays of silver nanowires grown in alumina membranes, is consistent with a broad-band singularity in the density of photonic states. It paves the road to a variety of applications ranging from the stealth technology to high-efficiency solar cells and photodetectors. (C) 2013 Optical Society of America


Nanoscience and Nanotechnology