Mie-resonant silicon waveguide for efficient coupling with excitonic emitters in InSe

TL;DR

This paper demonstrates that silicon Mie-resonant nanodisks can significantly enhance the radiative coupling efficiency of excitonic emitters in InSe, leading to brighter on-chip light sources for integrated photonics.

Contribution

It introduces a novel silicon Mie-resonant waveguide design that improves coupling efficiency with excitonic emitters in InSe, supported by experimental photoluminescence enhancement data.

Findings

Photoluminescence power increased by ~2.5 times at 950 nm.

Efficient excitation of Mie-type magnetic dipole resonances.

Potential for improved on-chip light emitters in photonics.

Abstract

Enhancement of radiative coupling efficiency between out-of-plane excitonic emitters in an indium selenide (InSe) film and an integrated waveguide formed by silicon (Si) Mie-resonant nanodisks is experimentally studied. Photoluminescence power at the resonant waveguide output is increased by~2.5 times at 950~nm in comparison with the case of a conventional rib waveguide of the same geometrical parameters due to the efficient excitation of Mie-type magnetic dipole resonances in individual nanoparticles. These results show inspiring possibilities for creating new on-chip light emitters for various integrated photonics applications.