Finite-size effects in wave transmission through plasmonic crystals: A tale of two scales
arXiv:2005.12778 · doi:10.1103/PhysRevB.102.075308
Abstract
We study optical coefficients that characterize wave propagation through layered structures called plasmonic crystals. These consist of a finite number of stacked metallic sheets embedded in dielectric hosts with a subwavelength spacing. By adjustment of the frequency, spacing, number as well as geometry of the layers, these structures may exhibit appealing transmission properties in a range of frequencies from the terahertz to the mid-infrared regime. Our approach uses a blend of analytical and numerical methods for the distinct geometries with infinite, translation invariant, flat sheets and nanoribbons. We describe the transmission of plane waves through a plasmonic crystal in comparison to an effective dielectric slab of equal total thickness that emerges from homogenization, in the limit of zero interlayer spacing. We demonstrate numerically that the replacement of the discrete plasmonic crystal by its homogenized counterpart can accurately capture a transmission coefficient akin to the extinction spectrum, even for a relatively small number of layers. We point out the role of a geometry-dependent corrector field, which expresses the effect of subwavelength surface plasmons. In particular, by use of the corrector we describe lateral resonances inherent to the nanoribbon geometry.
References in corpus (18)
- The electronic properties of graphene
- Van der Waals heterostructures
- Polaritons in layered 2D materials
- Manipulating infrared photons using plasmons in transparent graphene superlattices
- Realization of an all-dielectric zero-index optical metamaterial
- Graphene on hexagonal boron nitride as a tunable hyperbolic metamaterial
- Quantum nanophotonics using hyperbolic metamaterials
- Hydrodynamics of electrons in graphene
- Tunable light-matter interaction and the role of hyperbolicity in graphene-hBN system
- Anisotropic 2D materials for tunable hyperbolic plasmonics
- Electronically Tunable Perfect Absorption in Graphene
- Plasmonically enhanced graphene photodetector featuring 100 GBd, high-responsivity and compact size
- Broadband gate-tunable THz plasmons in graphene heterostructures
- From surface to volume plasmons in hyperbolic metamaterials: General existence conditions for bulk high-k waves in metal-dielectric and graphene-dielectric multilayers
- Optically and Electrically Tunable Dirac Points and Zitterbewegung in Graphene-Based Photonic Superlattices
- Epsilon-Near-Zero behavior from plasmonic Dirac point: theory and realization using two-dimensional materials
- Dipole excitation of surface plasmon on a conducting sheet: finite element approximation and validation
- Universal behavior of dispersive Dirac cone in gradient-index plasmonic metamaterials