Tailoring and imaging the plasmonic local density of states in crystalline nanoprisms

Surface plasmon (SP) technologies exploit the spectral and spatial properties of collective electronic oscillations in noble metals placed in an incident optical field. Yet the SP local density of states (LDOS), which rule the energy transducing phenomena between the SP and the electromagnetic field...

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Bibliographic Details
Published in:Nature materials 2013-05, Vol.12 (5), p.426-432
Main Authors: Viarbitskaya, Sviatlana, Teulle, Alexandre, Marty, Renaud, Sharma, Jadab, Girard, Christian, Arbouet, Arnaud, Dujardin, Erik
Format: Article
Language:English
Subjects:
639/301/1019/1021
639/301/930/328
Biomaterials
Chemical Sciences
Condensed Matter Physics
Convolution
Electromagnetic fields
Gold
Luminescence
Material chemistry
Materials Science
Microscopy
Nanostructured materials
Nanotechnology
Optical and Electronic Materials
Single crystals
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Summary:Surface plasmon (SP) technologies exploit the spectral and spatial properties of collective electronic oscillations in noble metals placed in an incident optical field. Yet the SP local density of states (LDOS), which rule the energy transducing phenomena between the SP and the electromagnetic field, is much less exploited. Here, we use two-photon luminescence (TPL) microscopy to reveal the SP-LDOS in thin single-crystalline triangular gold nanoprisms produced by a quantitative one-pot synthesis at room temperature. Variations of the polarization and the wavelength of the incident light redistribute the TPL intensity into two-dimensional plasmonic resonator patterns that are faithfully reproduced by theoretical simulations. We demonstrate that experimental TPL maps can be considered as the convolution of the SP-LDOS with the diffraction-limited Gaussian light beam. Finally, the SP modal distribution is tuned by the spatial coupling of nanoprisms, thus allowing a new modal design of plasmonic information processing devices. Much less exploited than the spectral and spatial properties of surface plasmons (SPs) are their local density of states (SP-LDOS), which rule a number of important nanoscale phenomena. Using two-photon luminescence microscopy, the SP-LDOS in ultrathin gold nanoprisms is now visualized directly, allowing for the SP modal distribution to be tuned.
ISSN:1476-1122
1476-4660
DOI:10.1038/nmat3581