Abstract

We report on the observation of discrete diffraction in surface plasmon polariton waveguide arrays at a wavelength of $1550\mathrm{nm}$. 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° as predicted by simulations.

© 2009 Optical Society of America

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