# Dual-band Dielectric Light-harvesting Nanoantennae Made by Nature

## TL;DR

This paper explores bio-inspired dual-band nanoantennae for solar energy harvesting, utilizing nanoparticle design principles derived from bacterial light harvesters to improve solar cell efficiency and thermal management.

## Contribution

It introduces a novel approach to designing dual-band dielectric nanoantennae inspired by bacterial light harvesters, enabling tailored absorption spectra for enhanced solar energy applications.

## Key findings

- Dual-band absorption in bacteria is due to pigment and geometry.
- Nanoparticle fabrication can manipulate these absorption bands.
- Potential applications include remote power charging and light sensing.

## Abstract

Mechanisms to use nanoparticles to separate sunlight into photovoltaic useful range and thermally useful range to increase the efficiency of solar cells and to dissipate heat radiatively are discussed based upon lessons we learnt from photosynthesis. We show that the dual-band maxima in the absorption spectrum of bacterial light harvestors not only are due to the bacteriochlorophylls involved but also come from the geometry of the light harvestor. Being able to manipulate these two bands arbitrarily enables us to fabricate the nanoparticles required. Such mechanisms are also useful for the design of remote power charging and light sensors.