Fabry-Perot interference pattern scattered by a sub-monolayer array of nanoparticles

Abstract

Understanding scattering of visible and infrared photons from nanomaterials and nanostructured materials is increasingly important for imaging, thermal management, and detection, and has implications for other parts of the electromagnetic spectrum (e.g., x-ray scattering and radar). New, interesting reports of photon scattering as a diagnostic probe, from inelastic x-ray scattering and interference to “nano-FTIR” microscopy using infrared photons, have been published and are under active investigation in laboratories around the world. Here, we report, for the first time to our best knowledge, the experimental discovery of a Fabry-Perot interference pattern that is scattered by the sub-monolayer array of plasmonic Ag nanoparticles, and confirm it analytically and with rigorous numerical FDTD simulations.

Mie-Resonant Structural Color of Silicon Nanosphere Monolayer Coupled with Fabry–Pérot Cavity

“…For example, reflection colors of Mie resonators are changed by electric field, − mechanical stress, − humidity, − etc. In many cases, the strategy to change color is using coupling with other optical modes and modifying the coupling strength. − In this work, we study the coupling of Mie modes of a Si NS monolayer and a Fabry–Pérot cavity mode and investigate how the reflection color is modified by the cavity length.…”