@article{1738,
  author       = {{Valentine, Jason and Zhang, Shuang and Zentgraf, Thomas and Ulin-Avila, Erick and Genov, Dentcho A. and Bartal, Guy and Zhang, Xiang}},
  issn         = {{0028-0836}},
  journal      = {{Nature}},
  number       = {{7211}},
  pages        = {{376--379}},
  publisher    = {{Springer Nature}},
  title        = {{{Three-dimensional optical metamaterial with a negative refractive index}}},
  doi          = {{10.1038/nature07247}},
  volume       = {{455}},
  year         = {{2008}},
}