Plasmonic abilities of gold and silver spherical nanoantennas in terms of size dependent multipolar resonance frequencies and plasmon damping rates
Krystyna Kolwas, Anastasiya Derkachova
TL;DR
This paper analyzes how the size of gold and silver spherical nanoantennas influences their plasmon resonance frequencies and damping rates, enabling tailored optical properties for specific applications.
Contribution
It provides a detailed characterization of size-dependent multipolar surface plasmon resonances and damping rates for gold and silver nanoantennas, including the effects of radiation damping.
Findings
Size-dependent resonance frequencies and damping rates are characterized.
Radiation damping significantly affects large-sized nanoantennas.
Nanoantenna properties can be tuned for specific optical functions.
Abstract
Absorbing and emitting optical properties of a spherical plasmonic nanoantenna are described in terms of the size dependent resonance frequencies and damping rates of the multipolar surface plasmons (SP). We provide the plasmon size characteristics for gold and silver spherical particles up to the large size retardation regime where the plasmon radiative damping is significant. We underline the role of the radiation damping in comparison with the energy dissipation damping in formation of receiving and transmitting properties of a plasmonic particle. The size dependence of both: the multipolar SP resonance frequencies and corresponding damping rates can be a convenient tool in tailoring the characteristics of plasmonic nanoantennas for given application. Such characteristics enable to control an operation frequency of a plasmonic nanoantenna and to change the operation range from the…
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