2012/10/31 by Søren Raza, Nicolas Stenger, Shima Kadkhodazadeh +9 · 3 citations
Engineering · Materials Science · Physics and Astronomy · #Atomic physics #Blueshift #Condensed matter physics #Drude model #Electron #Gold and Silver Nanoparticles Synthesis and Applications #Materials science #Molecular physics #Nanoparticle #Nanotechnology #Optoelectronics #Photoluminescence #Physics #Plasmon #Plasmonic and Surface Plasmon Research #Quantum #Quantum dot #Quantum mechanics #Resonance (particle physics) #Semiclassical physics #Spectroscopy #Spectroscopy and Quantum Chemical Studies #Surface plasmon resonance #cond-mat.mes-hall #physics.optics
paper · pdf · doi:10.1515/nanoph-2012-0032
published as Nanophotonics 2, 131 (2013) · 7 pages including 2 figures. S.R. and N.S. contributed equally. Accepted for Nanophotonics (De Gruyter, http://www.degruyter.com/view/j/nanoph)
arxiv created 2013/02/28 · openalex publication_date 2013/03/23 · arxiv updated 2013/04/19 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
Abstract We study the surface plasmon (SP) resonance energy of isolated spherical Ag nanoparticles dispersed on a silicon nitride substrate in the diameter range 3.5–26 nm with monochromated electron energy‐loss spectroscopy. A significant blueshift of the SP resonance energy of 0.5 eV is measured when the particle size decreases from 26 down to 3.5 nm. We interpret the observed blueshift using three models for a metallic sphere embedded in homogeneous background material: a classical Drude model with a homogeneous electron density profile in the metal, a semiclassical model corrected for an inhomogeneous electron density associated with quantum confinement, and a semiclassical nonlocal hydrodynamic description of the electron density. We find that the latter two models provide a qualitative explanation for the observed blueshift, but the theoretical predictions show smaller blueshifts than observed experimentally.