Fig. 7From: Loosely-bound low-loss surface plasmons in hyperbolic metamaterialA three-layer (dielectric/metamaterial/dielectric) waveguide structure. a Schematic of surface-bound wave supported by a three-layer waveguide: Ag/SiO2-based hyperbolic metamaterial core (with f Ag = 0.1) is sandwiched by silica (Q) or soda-lime glass (G) symmetric cladding. b Analytical calculation of propagation length for core thickness in the range of 10–250 nm. c Analytical calculation of penetration depth into claddingBack to article page