Surface Lattice Resonances in Self-Assembled Gold Nanoparticle Arrays: Impact of Lattice Period, Structural Disorder, and Refractive Index on Resonance Quality
Ekaterina Ponomareva, Kirsten Volk, Paul Mulvaney, Matthias Karg
Langmuir: the ACS journal of surfaces and colloids | American Chemical Society | Published : 2020
Surface lattice resonances are optical resonances composed of hybridized plasmonic and diffractive modes. These collective resonances occur in periodic arrays of plasmonic nanoparticles with wavelength-scale interparticle distances. The appearance and strength of surface lattice resonances strongly depend on the single particle localized surface plasmon resonance and its spectral overlap with the diffractive modes of the array. Coupling to in-plane orders of diffraction is also strongly affected by the refractive index environment and its symmetry. In this work, we address the impact of the interparticle distance, the symmetry of the refractive index environment, and structural imperfections..View full abstract
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Awarded by ARC
Awarded by German Research Foundation (DFG)
The authors acknowledge financial support by the German Academic Exchange service (DAAD) through its Thematic Network Melbourne-Bayreuth Polymer/Colloid Network sponsored from funds of the Federal Ministry of Education and Research (BMBF). P.M. thanks the ARC for support through Grant CE170100026. M.K. acknowledges the German Research Foundation (DFG) for funding under grant KA3880/6-1. The authors thank Heyou Zhang from the University of Melbourne for his assistance with the DFM measurements and Sophia Kohler from the Heinrich-Heine-University Dusseldorf for her assistance with the TEM measurements.