Scattering Suppression of Silica Microspheres with Semicontinuous Plasmonic Shell

TL;DR

This paper demonstrates experimental suppression of scattering and absorption in silica microspheres using semicontinuous gold shells, which significantly reduce scattering peaks across visible and infrared spectra.

Contribution

It introduces a novel semicontinuous gold shell coating method to suppress scattering and absorption in silica microspheres, advancing optical control techniques.

Findings

Gold shells cause significant extinction in visible and infrared ranges.

Silica scattering peaks decrease with increased gold coverage.

Vibrational stretching contributions diminish as gold coverage increases.

Abstract

The scattering and absorption suppression of the silica microspheres is experimentally achieved by semicontinuous gold shell synthesized on the silica microspheres. These fractal gold shells on the silica spheres are shown to have significant extinction in the visible and mid-infrared spectral range. It is found that the silica scattering peak in the visible and the relative contribution of the vibrational stretching band in the infrared gradually decreases with increasing of the gold coverage.