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Hybrid dielectric waveguide spectroscopy of individual plasmonic nanoparticles

Jorge Cuadra (Institutionen för fysik, Bionanofotonik (Chalmers)) ; Ruggero Verre (Institutionen för fysik, Bionanofotonik (Chalmers)) ; Martin Wersäll (Institutionen för fysik, Bionanofotonik (Chalmers)) ; Clemens Krückel (Institutionen för mikroteknologi och nanovetenskap, Fotonik) ; Victor Torres Company (Institutionen för mikroteknologi och nanovetenskap, Fotonik) ; Tomasz Antosiewicz (Institutionen för fysik, Bionanofotonik (Chalmers)) ; Timur Shegai (Institutionen för fysik, Bionanofotonik (Chalmers))
AIP Advances Vol. 7 (2017), 7, p. Article no: 075207 .
[Artikel, refereegranskad vetenskaplig]

© 2017 Author(s). Plasmonics is a mature scientific discipline which is now entering the realm of practical applications. Recently, significant attention has been devoted to on-chip hybrid devices where plasmonic nanoantennas are integrated in standard Si 3 N 4 photonic waveguides. Light in these systems is usually coupled at the waveguide apexes by using multiple objectives and/or tapered optical fibers, rendering the analysis of spectroscopic signals a complicated task. Here, we show how by using a grating coupler and a low NA objective, quantitative spectroscopic information similar to standard dark-field spectroscopy can be obtained at the single-nanoparticle level. This technology may be useful for enabling single-nanoparticle studies in non-linear excitation regimes and/or in complex experimental environments, thus enriching the toolbox of nanophotonic methods.



Denna post skapades 2017-08-30. Senast ändrad 2017-09-14.
CPL Pubid: 251515

 

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