Comparative study on the uniform energy deposition achievable via optimized plasmonic nanoresonator distributions

TL;DR

This study optimizes plasmonic nanoresonator distributions to achieve nearly uniform energy deposition from short pulses, with potential applications in phase transitions and fusion.

Contribution

It introduces a method for optimizing nanoresonator distributions to maximize uniform energy deposition, outperforming nanorods in certain conditions.

Findings

Core-shell nanoresonators achieve higher absorptance than nanorods.

Optimized distributions ensure uniform energy deposition across layers.

Potential applications include phase transitions and fusion energy.

Abstract

Plasmonic nanoresonators of core-shell composition and nanorod shape were optimized to tune their absorption cross-section maximum to the central wavelength of a short pulse. Their distribution along a pulse-length scaled target was optimized to maximize the absorptance with the criterion of minimal absorption difference in between neighbouring layers. Successive approximation of layer distributions made it possible to ensure almost uniform deposited energy distribution up until the maximal overlap of two counter-propagating pulses. Based on the larger absorptance and smaller uncertainty in absorptance and energy distribution core-shell nanoresonators override the nanorods. However, optimization of both nanoresonator distributions has potential applications, where efficient and uniform energy deposition is crucial, including phase transitions and even fusion.