Portal de Periódicos da CAPES

Demonstration of Al:ZnO as a plasmonic component for near-infrared metamaterials

2012; National Academy of Sciences; Volume: 109; Issue: 23 Linguagem: Inglês

10.1073/pnas.1121517109

1091-6490

Gururaj V. Naik, Jingjing Liu, Alexander V. Kildishev, Vladimir M. Shalaev, Alexandra Boltasseva,

Gold and Silver Nanoparticles Synthesis and Applications

Noble metals such as gold and silver are conventionally used as the primary plasmonic building blocks of optical metamaterials. Making subwavelength-scale structural elements from these metals not only seriously limits the optical performance of a device due to high absorption, it also substantially complicates the manufacturing process of nearly all metamaterial devices in the optical wavelength range. As an alternative to noble metals, we propose to use heavily doped oxide semiconductors that offer both functional and fabrication advantages in the near-infrared wavelength range. In this letter, we replace a metal with aluminum-doped zinc oxide as a new plasmonic material and experimentally demonstrate negative refraction in an Al:ZnO/ZnO metamaterial in the near-infrared range.