Non-Hermitian dynamics and nonreciprocity of optically coupled nanoparticles
Abstract
Non-Hermitian dynamics, as observed in photonic, atomic, electrical, and optomechanical platforms, holds great potential for sensing applications and signal processing. Recently, fully tunable nonreciprocal optical interaction has been demonstrated between levitated nanoparticles. Here, we use this tunability to investigate the collective non-Hermitian dynamics of two nonreciprocally and nonlinearly interacting nanoparticles. We observe parity-time symmetry breaking and, for sufficiently strong coupling, a collective mechanical lasing transition, where the particles move along stable limit cycles. This work opens up a research avenue of nonequilibrium multi-particle collective effects, tailored by the dynamic control of individual sites in a tweezer array.
Keywords
Cite
@article{arxiv.2310.02610,
title = {Non-Hermitian dynamics and nonreciprocity of optically coupled nanoparticles},
author = {Manuel Reisenbauer and Henning Rudolph and Livia Egyed and Klaus Hornberger and Anton V. Zasedatelev and Murad Abuzarli and Benjamin A. Stickler and Uroš Delić},
journal= {arXiv preprint arXiv:2310.02610},
year = {2024}
}