A comparison of transmission spectra from periodic, quasiperiodic, and randomly spaced slit arrays in thick gold films reveals resonant plasmonic excitations that arise solely due to the long-range order of the quasiperiodic structures. Specifically, first-order plasmonic resonances at the air-gold interface of the quasiperiodic arrays are identified at a broader range of wavelengths than those observed from periodic structures with the same average slit distance. Thus, a quasiperiodic plasmonic coupler that couples both visible and near-infrared light to surface plasmon polaritons is designed and demonstrated.
incl. Erratum

Appl. Phys. Lett.

le Feber, B., Cesario, J., Zeijlemaker, H., Rotenberg, N., & Kuipers, K. (2011). Exploiting long-ranged order in quasiperiodic structures for broadband plasmonic excitation. Appl. Phys. Lett., 98(20, Article number: 201108), 1–4. doi:10.1063/1.3592847