Cavity Quantum Electrodynamics with a Single Quantum Dot Coupled to a Photonic Molecule

TL;DR

This paper demonstrates strong coupling between a quantum dot and a photonic molecule, revealing anti-crossing behavior and cavity interactions, advancing quantum electrodynamics in integrated photonic systems.

Contribution

It reports the first observation of cavity QED effects with a quantum dot coupled to a photonic molecule, including anti-crossing and off-resonant interactions.

Findings

Achieved strong coupling regime with quantum dot and photonic molecule

Observed anti-crossing between quantum dot and super-modes

Detected off-resonant cavity-cavity interactions

Abstract

We demonstrate the effects of cavity quantum electrodynamics for a quantum dot coupled to a photonic molecule, consisting of a pair of coupled photonic crystal cavities. We show anti-crossing between the quantum dot and the two super-modes of the photonic molecule, signifying achievement of the strong coupling regime. From the anti-crossing data, we estimate the contributions of both mode-coupling and intrinsic detuning to the total detuning between the super-modes. Finally, we also show signatures of off-resonant cavity-cavity interaction in the photonic molecule.