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Surface plasmons at single nanoholes in Au-films

L. Yin·V. K. Vlasko-Vlasov·A. Rydh·J. Pearson·U. Welp·S. -H. Chang·S. K. Gray·G. C. Schatz·D. E. Brown·C. W. Kimball
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Abstract

The generation of surface plasmon polaritons (SPP's) at isolated nanoholes in 100 nm thick Au films is studied using near-field scanning optical microscopy (NSOM). Finite-difference time-domain calculations, some explicitly including a model of the NSOM tip, are used to interpret the results. We find the holes act as point-like sources of SPP's and demonstrate that interference between SPP's and a directly transmitted wave allows for determination of the wavelength, phase, and decay length of the SPP. The near-field intensity patterns can be manipulated by varying the angle and polarization of the incident beam.

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L. Yin, V. K. Vlasko-Vlasov, A. Rydh, J. Pearson, U. Welp, S. -H. Chang, S. K. Gray, G. C. Schatz, D. E. Brown, C. W. Kimball. 2004-01-21. Surface plasmons at single nanoholes in Au-films. https://doi.org/10.1063/1.1773362

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