Tunable low-loss plasmonic mirror for diffuse optical scattering

Rufina S A Sesuraj*, Tristan L. Temple, Darren M. Bagnall

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

The influence of driving field interference on light scattering is demonstrated for arrays of randomly arranged silver nanodiscs near a silver mirror. The peak driving field intensity is spectrally tuned by varying the separation distance between the nanodisc array and the mirror, while the plasmonic resonance position is tuned by modifying the nanodisc diameter. Scattering is maximized when the resonance position coincides with the peak driving field intensity. The optimized plasmonic mirror exhibits 60% diffuse reflectance at a wavelength of 950nm with low (̃10-12%) broadband absorption losses, for 6% surface coverage of 200-nm-diameter nanodiscs on 110nm SiO2.

Original languageEnglish
Article number125205
Pages (from-to)125205-1-125205-3
Number of pages3
JournalApplied Physics Express
Volume5
Issue number12
DOIs
Publication statusPublished - Dec 2012

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