@misc{s2015a,
  title = {Subdiffractional focusing and guiding of polaritonic rays in a natural hyperbolic material},
  author = {S. Dai, Q. Ma, T. Andersen, A. S. Mcleod, Z. Fei, M. K. Liu, M. Wagner, K. Watanabe, T. Taniguchi, M. Thiemens, F. Keilmann, P. Jarillo-Herrero, M. M. Fogler, D. N. Basov},
  publisher = {Springer Science and Business Media LLC},
  year = {2015-04-22},
  keywords = {Hyperbolic media, infrared nano-imaging, waveguide}
}