Ab initio analytical model of lasing in plasmonic lattices

TL;DR

This paper develops an analytical first-principles model for lasing in plasmonic nanoparticle lattices, revealing conditions for both traditional and inversionless lasing modes, with potential experimental observability.

Contribution

It introduces the first analytical ab initio model for lasing in plasmonic lattices, including conditions for inversionless lasing modes.

Findings

Lasing conditions derived for multiple diffraction orders.

Identification of inversionless lasing phenomena.

Potential for experimental detection via total internal reflection.

Abstract

The first-principles theory of lasing in a rectangular lattice of spherical metal nanoparticles is developed in a fully analytical form in the dipole approximation. The lasing conditions are obtained for different diffraction orders, both propagating and evanescent. Their analysis reveals that besides usual lasing there can be lasing without population inversion which is invisible in conventional experiments, but can be observed in total internal reflection.