Surface plasmon polariton discrete diffraction compensation

Abstract

We report on the observation of discrete diffraction in surface plasmon polariton waveguide arrays at a wavelength of 1550 nm. We also adopt the effective index method to reduce our simulation geometry to two-dimensions, predict the spread of single-waveguide excitation in parallel waveguide arrays, and explore changing the excitation angle to detune the waveguides. Our experimental results show discrete diffraction compensation at an angle of 2.2 degrees as predicted by simulations.

Nonlinear switching in arrays of semiconductor on metal photonic wires

“…2,3 This has also prompted theoretical research into linear and nonlinear properties of subwavelength waveguide arrays. [4][5][6][7][8][9] A possibility to observe the nonlinear switching in few millimeter long arrays of the subwavelength silicon on insulator photonic wires has also been studied experimentally. 10 Apart from the subwavelength guidance achieved by the total internal reflection ͑TIR͒ in the high index semiconductor photonic wires 3 as, e.g., silicon, AlGaAs, or GaInP, on the dielectric or semiconductor substrates, one can use surface plasmon polaritons at the metal-dielectric or metal-semiconductor interfaces to provide tight confinement of electromagnetic energy.…”