8 research outputs found
Graphene-based polaritonic crystal
It is shown that monolayer graphene deposited on a spatially-periodic gate
behaves as a polaritonic crystal. Its band structure depending on the applied
gate voltage is studied. The scattering of electromagnetic radiation from such
a crystal is presented calculated and analyzed in terms of Fano-type resonances
between the reflected continuum and plasmon-polariton modes forming narrow
bands.Comment: submitted to Phys. Rev. Let
Mechanism for graphene-based optoelectronic switches by tuning surface plasmon-polaritons in monolayer graphene
It is shown that one can explore the optical conductivity of graphene,
together with the ability of controlling its electronic density by an applied
gate voltage, in order to achieve resonant coupling between an external
electromagnetic radiation and surface plasmon-polaritons in the graphene layer.
This opens the possibility of electrical control of the intensity of light
reflected inside a prism placed on top of the graphene layer, by switching
between the regimes of total reflection and total absorption. The predicted
effect can be used to build graphene-based opto-electronic switches.Comment: 5 page
Theory of extraordinary optical transmission through subwavelength hole arrays
We present a fully three-dimensional theoretical study of the extraordinary
transmission of light through subwavelength hole arrays in optically thick
metal films. Good agreement is obtained with experimental data. An analytical
minimal model is also developed, which conclusively shows that the enhancement
of transmission is due to tunneling through surface plasmons formed on each
metal-dielectric interfaces. Different regimes of tunneling (resonant through a
''surface plasmon molecule", or sequential through two isolated surface
plasmons) are found depending on the geometrical parameters defining the
system.Comment: 4 pages, 4 figure