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Controlled Fabrication of Optical Signal Input/Output Sites on Plasmonic Nanowires.

08:00 EDT 10th March 2020 | BioPortfolio

Summary of "Controlled Fabrication of Optical Signal Input/Output Sites on Plasmonic Nanowires."

Silver nanowires have attracted considerable attention as sub-diffraction limited diameter waveguides in a variety of applications including cell endoscopy and photonic integrated circuitry. Optical signal transport occurs by coupling light into propagating surface plasmons which scatter back into light further along the wire. However these inter-conversions only occur efficiently at wire ends, or at defects along the wire, which are not controlled during synthesis. Here we overcome this limitation, demonstrating the visible laser light-induced fabrication of gold nanostructures at desired positions on silver nanowires, and their utility as efficient in/out coupling points for light. The gold nanostructures grow via plasmon-induced reduction of Au(III) and are shown to be excellent 'hotspots' for surface-enhanced Raman scattering.

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Name: Nano letters
ISSN: 1530-6992
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