Light scattering from 2D arrays of monodispersed Ag-nanoparticles separated by tunable nano-gaps: spectral evolution and analytical analysis of plasmonic coupling.
Two dimensional arrays of monodispersed Ag-nanoparticles separated by different gaps with sub-10 nm precision are fabricated on anodic alumina substrates with self-organized pores. Light scattering spectra from the arrays evolve with the gaps, revealing plasmonic coupling among the nanoparticles, which can be satisfactorily interpreted by analytical formulae derived from generic dipolar approximation. The general formulism lays down a foundation for predicting the Q factor of an array of metallic nano-particles and its geometric characteristics.
Biring
Sajal
S
Taiwan International Graduate Program, Department of Chemistry, National Tsing-Hua University, Hsinchu, Taiwan.
Wang
Huai-Hsien
HH
Wang
Juen-Kai
JK
Wang
Yuh-Lin
YL
D002623:Chemistry Techniques, Analytical / Q000379:methods; D004574:Electromagnetic Fields; D004867:Equipment Design; D008027:Light; D053768:Metal Nanoparticles / Q000737:chemistry*; D015233:Models, Statistical; D055095:Optics and Photonics; D010316:Particle Size; D012542:Scattering, Radiation; D012834:Silver / Q000737:chemistry*; D013050:Spectrometry, Fluorescence / Q000379:methods; D013055:Spectrophotometry, Infrared / Q000379:methods; D013059:Spectrum Analysis, Raman
D012834:Silver