Ontology highlight
ABSTRACT:
SUBMITTER: Dai S
PROVIDER: S-EPMC4421822 | biostudies-other | 2015
REPOSITORIES: biostudies-other
Dai S S Ma Q Q Andersen T T Mcleod A S AS Fei Z Z Liu M K MK Wagner M M Watanabe K K Taniguchi T T Thiemens M M Keilmann F F Jarillo-Herrero P P Fogler M M MM Basov D N DN
Nature communications 20150422
Uniaxial materials whose axial and tangential permittivities have opposite signs are referred to as indefinite or hyperbolic media. In such materials, light propagation is unusual leading to novel and often non-intuitive optical phenomena. Here we report infrared nano-imaging experiments demonstrating that crystals of hexagonal boron nitride, a natural mid-infrared hyperbolic material, can act as a 'hyper-focusing lens' and as a multi-mode waveguide. The lensing is manifested by subdiffractional ...[more]