Universal optical polarizability for plasmonic nanostructures
arXiv:2301.02384 · doi:10.1103/PhysRevA.107.L061503
Abstract
We develop an analytical model for calculation of optical spectra for metal nanostructures of arbitrary shape supporting localized surface plasmons (LSPs). For plasmonic systems with characteristic size below the diffraction limit, we obtain an explicit expression for optical polarizability that describes the lineshape of optical spectra solely in terms of the metal dielectric function and LSP frequency. The amplitude of the LSP spectral band is determined by the effective system volume that, for long-wavelength LSPs, can significantly exceed the physical volume of metal nanostructure. Within the quasistatic approach, we derive the exact LSP Green's function and establish general spectral properties of LSPs, including the distribution and oscillator strength of the LSP states. These results can be used to model or interpret the experimental spectra of plasmonic nanostructures and to tune their optical properties for various applications.
11 pages, 2 figures. Additional material is included in the Appendix on the properties of plasmon Green function
References in corpus (10)
- On-command enhancement of single molecule fluorescence using a gold nanoparticle as an optical nano-antenna
- Optical properties of metal nanoparticles with arbitrary shapes
- Vacuum Rabi splitting and strong coupling dynamics for surface plasmon polaritons and Rhodamine 6G molecules
- Theory of the strong coupling between quantum emitters and propagating surface plasmons
- Cooperative emission of light by an ensemble of dipoles near a metal nanostucture: The plasmonic Dicke effect
- Collective Plasmonic-Molecular Modes in the Strong Coupling Regime
- Local density of states for nanoplasmonics
- Spontaneous decay of a quantum emitter near a plasmonic nanostructure
- Exciton-plasmon energy exchange drives the transition to strong coupling regime
- Interacting quantum plasmons in metal-dielectric structures