title: Plasmonic excitations of 1D metal-dielectric interfaces in 2D systems: 1D surface plasmon polaritons.
abstract: Surface plasmon-polariton (SPP) excitations of metal-dielectric interfaces are a fundamental light-matter interaction which has attracted interest as a route to spatial confinement of light far beyond that offered by conventional dielectric optical devices. Conventionally, SPPs have been studied in noble-metal structures, where the SPPs are intrinsically bound to a 2D metal-dielectric interface. Meanwhile, recent advances in the growth of hybrid 2D crystals, which comprise laterally connected domains of distinct atomically thin materials, provide the first realistic platform on which a 2D metal-dielectric system with a truly 1D metal-dielectric interface can be achieved. Here we show for the first time that 1D metal-dielectric interfaces support a fundamental 1D plasmonic mode (1DSPP) which exhibits cutoff behavior that provides dramatically improved light confinement in 2D systems. The 1DSPP constitutes a new basic category of plasmon as the missing 1D member of the plasmon family: 3D bulk plasmon, 2DSPP, 1DSPP, and 0D localized SP.
authors.affiliation: Photonic Systems Laboratory, School of EECS, Seoul National University, Seoul 151-744, Korea.
authors.forename: Daniel R
authors.initials: DR
authors.lastname: Mason
authors.affiliation: Photonic Systems Laboratory, School of EECS, Seoul National University, Seoul 151-744, Korea.
authors.forename: Sergey G
authors.initials: SG
authors.lastname: Menabde
authors.affiliation: Photonic Systems Laboratory, School of EECS, Seoul National University, Seoul 151-744, Korea.
authors.forename: Sunkyu
authors.initials: S
authors.lastname: Yu
authors.affiliation: Photonic Systems Laboratory, School of EECS, Seoul National University, Seoul 151-744, Korea.
authors.forename: Namkyoo
authors.initials: N
authors.lastname: Park