TY - JOUR T1 - Near-field characterization of guided polariton propagation and cutoff in surface plasmon waveguides JF - Physical Review B Y1 - 2006 A1 - Rashid Zia A1 - Jon A. Schuller A1 - Mark L. Brongersma VL - 74 IS - 16 JO - Phys. Rev. B ER -