Blueshift of the surface plasmon resonance in silver nanoparticles studied with EELS
Søren Raza,Nicolas Stenger,Shima Kadkhodazadeh,Søren Vang Fischer,Natalie Kostesha,Antti-Pekka Jauho,Andrew Burrows,Martijn Wubs,N. Asger Mortensen +8 more
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In this article, 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 was measured.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 this http URL a homogeneous medium.read more
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Mapping surface plasmons on a single metallic nanoparticle
TL;DR: In this paper, the authors used electron beams instead of photons to detect plasmons as resonance peaks in the energy-loss spectra of sub-nanometre electron beams rastered on nanoparticles of well-defined geometrical parameters.
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TL;DR: This review discusses and compares the key models and experiments used to explore how the quantum nature of electrons impacts plasmonics in the context of quantum size corrections of localized plasmons and quantum tunneling between nanoparticle dimers.
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Quantum mechanical effects in plasmonic structures with subnanometre gaps.
Wenqi Zhu,Ruben Esteban,Andrei G. Borisov,Jeremy J. Baumberg,Peter Nordlander,Henri J. Lezec,Javier Aizpurua,Kenneth B. Crozier +7 more
TL;DR: This review outlines the findings of many groups into quantum mechanical effects in nanogap plasmons, and discusses outstanding challenges and future directions.
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A generalized non-local optical response theory for plasmonic nanostructures
TL;DR: This theory explains surprisingly well both the frequency shifts and size-dependent damping in individual metallic nanoparticles as well as the observed broadening of the crossover regime from bonding-dipole plasmons to charge-transfer plasmon in metal nanoparticle dimers, thus unravelling a classical broadening mechanism that even dominates the widely anticipated short circuiting by quantum tunnelling.
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Resonance shifts and spill-out effects in self-consistent hydrodynamic nanoplasmonics
Giuseppe Toscano,Jakob Straubel,Alexander Kwiatkowski,Carsten Rockstuhl,Ferdinand Evers,Hongxing Xu,N. Asger Mortensen,Martijn Wubs +7 more
TL;DR: This work presents a self-consistent hydrodynamic model (SC-HDM), where both the ground state and the excited state properties of an inhomogeneous electron gas can be determined, and is able to explain the size-dependent surface resonance shifts of Na and Ag nanowires and nanospheres.
References
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Plasmonics: Fundamentals and Applications
TL;DR: In this paper, the authors discuss the role of surface plasmon polaritons at metal/insulator interfaces and their application in the propagation of surfaceplasmon waveguides.
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TL;DR: The basic concepts behind plasmonics-enabled light concentration and manipulation are discussed, an attempt to capture the wide range of activities and excitement in this area is made, and possible future directions are speculated on.
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Principles of nano-optics
Lukas Novotny,Bert Hecht +1 more
TL;DR: In this paper, the authors proposed a method for propagating and focusing of optical fields in a nano-optics environment using near-field optical probes and probe-sample distance control.
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Optical properties of metallic films for vertical-cavity optoelectronic devices.
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MonographDOI
Principles of Nano-Optics by Lukas Novotny
Lukas Novotny,Bert Hecht +1 more
TL;DR: The NANO and QUANTUM OPTICS: An Introduction to BASIC as discussed by the authors is a collection of the most popular NANOPHOTONICS articles from 2012-2018.