title: Enhanced spontaneous emission inside hyperbolic metamaterials.
abstract: Hyperbolic metamaterials can enhance spontaneous emission, but the radiation-matter coupling is not optimized if the light source is placed outside such media. We demonstrate a 3-fold improvement of the Purcell factor over its outer value and a significant enlargement in bandwidth by including the emitter within a Si/Ag periodic multilayer metamaterial. To extract the plasmonic modes of the structure into the far field we implement two types of 1D grating with triangular and rectangular profile, obtaining a 10-fold radiative enhancement at visible frequencies.
authors.forename: Lorenzo
authors.initials: L
authors.lastname: Ferrari
authors.forename: Dylan
authors.initials: D
authors.lastname: Lu
authors.forename: Dominic
authors.initials: D
authors.lastname: Lepage
authors.forename: Zhaowei
authors.initials: Z
authors.lastname: Liu