Strongly coupled slow-light polaritons in one-dimensional disordered localized states

TL;DR

This paper reports the first observation of strongly coupled polariton states in disordered one-dimensional slow-light photonic crystal modes, demonstrating large vacuum Rabi splittings and potential for quantum information applications.

Contribution

It introduces the experimental realization of coherent polariton states in disordered 1D localized modes, expanding the understanding of strong coupling in complex photonic systems.

Findings

Large vacuum Rabi splittings up to 311 μeV observed

Strong localized polaritons modeled with tight-binding approaches

Disorder-induced slow-light polaritons enable quantum control platforms

Abstract

Cavity quantum electrodynamics advances the coherent control of a single quantum emitter with a quantized radiation field mode, typically piecewise engineered for the highest finesse and confinement in the cavity field. This enables the possibility of strong coupling for chip-scale quantum processing, but till now is limited to few research groups that can achieve the precision and deterministic requirements for these polariton states. Here we observe for the first time coherent polariton states of strong coupled single quantum dot excitons in inherently disordered one-dimensional localized modes in slow-light photonic crystals. Large vacuum Rabi splittings up to 311 {\mu}eV are observed, one of the largest avoided crossings in the solid-state. Our tight-binding models with quantum impurities detail these strong localized polaritons, spanning different disorder strengths, complementary to model-extracted pure dephasing and incoherent pumping rates. Such disorder-induced slow-light polaritons provide a platform towards coherent control, collective interactions, and quantum information processing.