Efficient absorption of visible radiation by gap plasmon resonators

We demonstrate experimentally a periodic array of differently-sized and circularly-shaped gap plasmon resonators (GPRs) with the average absorption ~94% for unpolarized light in the entire visible wavelength range (400-750 nm). Finite-element simulations verify that the polarization insensitive broa...

Full description

Saved in:
Bibliographic Details
Published inOptics express Vol. 20; no. 12; pp. 13311 - 13319
Main Authors Nielsen, Michael G, Pors, Anders, Albrektsen, Ole, Bozhevolnyi, Sergey I
Format Journal Article
LanguageEnglish
Published United States 04.06.2012
Online AccessGet full text

Cover

More Information
Summary:We demonstrate experimentally a periodic array of differently-sized and circularly-shaped gap plasmon resonators (GPRs) with the average absorption ~94% for unpolarized light in the entire visible wavelength range (400-750 nm). Finite-element simulations verify that the polarization insensitive broadband absorption originates from localized gap surface plasmons whose resonant excitations only weakly depend on the angle of incidence. Arrays of GPRs also exhibit enhanced local field intensities (~115) as revealed by scanning two-photon photoluminescence microscopy, that are spectrally correlated with the minima in corresponding linear reflection spectra.
Bibliography:ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
ISSN:1094-4087
1094-4087
DOI:10.1364/oe.20.013311