Journal
ACS NANO
Volume 7, Issue 5, Pages 4334-4342Publisher
AMER CHEMICAL SOC
DOI: 10.1021/nn400842m
Keywords
surface plasmon resonance; plasmonic nanoparticles; nonlocality; spatial dispersion
Categories
Funding
- The Royal Society via the Newton International Fellowship
- EPSRC (U.K.)
- EPSRC [EP/K007793/1, EP/J018457/1, EP/H000917/2] Funding Source: UKRI
- Engineering and Physical Sciences Research Council [EP/K007793/1, EP/J018457/1, EP/H000917/2] Funding Source: researchfish
Ask authors/readers for more resources
Nonlocal optical response of materials, important at the nanometric scale, influences numerous optical phenomena, such as electromagnetic field confinement and spectral characteristics of plasmonic resonances. Here, we present a general phenomenological approach to account for nonlocal material polarizabilities in nanoscale metal particles. The problem of nonlocal plasmonic resonances is formulated by an integro-differential equation in a space domain and solved by adopting its weak form, implemented in the finite element method, thus, dispensing with the requirements on additional boundary conditions. As an example, nonlocal smearing effects in plasmonic nanorods of various cross sections and nanotubes have been considered. Clear signature of nonlocality manifests itself in the interference fringes in the potential profile and a significant frequency shift of the localized surface plasmon resonances. These effects are especially important for nanoparticles with geometrical features comparable to the de Broglie wavelengths of electrons participating in the light-matter interactions. The proposed method provides a universal tool for phenomenological account of nonlocalities of any kind with the only requirement of linearity In system's response.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available