Non-regularly shaped plasmon resonant nanoparticle as localized light source for near-field microscopy

We study numerically two-dimensional nanoparticles with a non-regular shape and demonstrate that these particles can support many more plasmon resonances than a particle with a regular shape (e.g. an ellipse). The electric field distributions associated with these different resonances are investigated in detail in the context of near-field microscopy. Depending on the particle shape, extremely strong and localized near-fields, with intensity larger than 10(5) that of the illumination wave, can be generated. We also discuss the spectral dependence of these near-fields and show that different spatial distributions are observed, depending which plasmon resonance is excited in the particle.


Published in:
Journal Of Microscopy-Oxford, 202, 60-65
Presented at:
6th International Conference on Near-field Optics and Related Techniques, ENSCHEDE, NETHERLANDS, Aug 27-31, 2000
Year:
2001
Keywords:
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 Record created 2011-04-11, last modified 2018-03-17

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