Tunable multipole resonances in plasmonic crystals made by four-beam holographic lithography

Y. Luo, X. Li, X. Zhang, S. Prybolsky, G. D. Shepard, S. Strauf

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

Abstract

Plasmonic nanostructures confine light to sub-wavelength scales, resulting in drastically enhanced light-matter interactions. Recent interest has focused on controlled symmetry breaking to create higher-order multipole plasmonic modes that store electromagnetic energy more efficiently than dipole modes. Here we demonstrate that four-beam holographic lithography enables fabrication of large-area plasmonic crystals with near-field coupled plasmons as well as deliberately broken symmetry to sustain multipole modes and Fano-resonances. Compared with the spectrally broad dipole modes we demonstrate an order of magnitude improved Q-factors (Q = 21) when the quadrupole mode is activated. We further demonstrate continuous tuning of the Fano-resonances using the polarization state of the incident light beam. The demonstrated technique opens possibilities to extend the rich physics of multipole plasmonic modes to wafer-scale applications that demand low-cost and high-throughput.

Original languageEnglish (US)
Article number053105
JournalApplied Physics Letters
Volume108
Issue number5
DOIs
StatePublished - Feb 1 2016

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

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