Absorption and scattering of light by metal-dielectric nanoeggs

TL;DR

This study investigates the optical and plasmonic properties of metal-dielectric nanoeggs, deriving size-dependent behaviors and shifts in resonance frequencies, with recommendations for material use in various spectral ranges.

Contribution

It provides new analytical expressions for size-dependent surface plasmon resonance frequencies and explains shifts in optical properties of nanoeggs.

Findings

Derived size-dependent resonance frequency expressions

Identified causes of spectral shifts in optical properties

Proposed material use recommendations for spectral optimization

Abstract

The optical and plasmonic properties of metal-dielectric nanoeggs were investigated in this study. Frequency dependencies of polarizability, absorption and scattering cross-sections, and radiation efficiency were determined. Expressions describing the size-dependent behavior of surface plasmon resonance frequencies were derived. The causes of blue and red shifts in the maxima of polarizability, absorption, and scattering cross-sections as well as variations in their number and amplitude were identified. Recommendations were proposed regarding the use of materials with maximum radiation efficiency in different spectral ranges.