Large-Scale and Low-Cost Fabrication of Silicon Mie Resonators

Abstract

High index dielectric nanoparticles have been proposed for many different applications. However, widespread utilization in practice also requires large-scale production methods for crystalline silicon nanoparticles, with engineered optical properties in a low-cost manner.Here, we demonstrate a facile, low-cost, and large-scale fabrication method of crystalline silicon colloidal Mie resonators in water, using a blender. The obtained nanoparticles are polydisperse with an almost spherical shape and the diameters controlled in the range 100−200 nm by a centrifugation process. Then the size distribution of silicon nanoparticles enables broad extinction from UV to near-infrared, confirmed by Mie theory when considering the size distribution in the calculations. Thanks to photolithographic and drop-cast deposition techniques to locate the position on a substrate of the colloidal nanoparticles, we experimentally demonstrate that the individual silicon nanoresonators show strong electric and magnetic Mie resonances in the visible range.

Characterization of self-assembled silver nanoparticle ink based on nanoemulsion method

“…In this study, the synthesized AgNPs have been confirmed with some functional groups stabilized on the surface, which provides extra shells to the AgNPs, leading to a larger d H through DLS method than the d S through TEM [58], as shown in electronic supplementary material, figure S2, and similar results have been reported in the previous studies [34,59,60].…”

Colloidal Mie Resonators for All‐Dielectric Metaoptics

“…c–e) Reproduced with permission. [ 39 ] Copyright 2019, American Chemical Society. f–h) Reproduced with permission.…”

“…Chaâbani et al demonstrated that crystalline Si nanoparticles 100–200 nm in diameters can be produced by crashing Si lumps in water using a kitchen blender (Figure 3c), followed by size separation by centrifugation. [ 39 ] This method provides a facile, low‐cost, and large‐scale fabrication of crystalline Si Mie resonators. However, the size and shape distributions are inevitably large and the circularity of the particles is 81% (Figure 3d,e), which is smaller than those of typical colloidal metal nanoparticles (≈90%).…”

Enhanced two-photon photoluminescence assisted by multi-resonant characteristics of a gold nanocylinder

“…We used an averaged refractive index approach in order to perform side illumination in simulations to avoid the possible numerical artifacts in FDTD caused by the injection of the light simultaneously in different media (glass-air). The effective refractive index was taken to be 1.25 [44]. By illumination from the side we can excite the quadrupolar mode by creating a phase variation along the base of the nanocylinder [33,45].…”