Performance analysis of nitride alternative plasmonic materials for localized surface plasmon applications

U. Guler, G. V. Naik, Alexandra Boltasseva, V. M. Shalaev, A. V. Kildishev

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

We consider methods to define the performance metrics for different plasmonic materials to be used in localized surface plasmon applications. Optical efficiencies are shown to be better indicators of performance as compared to approximations in the quasistatic regime. The near-field intensity efficiency, which is a generalized form of the well-known scattering efficiency, is a more flexible and useful metric for local-field enhancement applications. We also examine the evolution of the field enhancement from a particle surface to the far-field regime for spherical nanoparticles with varying radii. Titanium nitride and zirconium nitride, which were recently suggested as alternative plasmonic materials in the visible and near-infrared ranges, are compared to the performance of gold. In contrast to the results from quasistatic methods, both nitride materials are very good alternatives to the usual plasmonic materials.
Original languageEnglish
JournalApplied Physics B
Volume107
Issue number2
Pages (from-to)285-291
ISSN0946-2171
DOIs
Publication statusPublished - 2012

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