Stark Control of Plexcitonic States in Incoherent Quantum Systems

TL;DR

This paper demonstrates the coherent optical Stark control of plexcitonic states in hybrid quantum systems, enabling tunable quantum optical effects and potential applications in quantum information processing.

Contribution

It introduces a method for Stark tuning of plexcitonic states in coupled quantum systems, showing control over Fano resonance, transparency, and Rabi splitting.

Findings

Stark tuning mitigates decoherence in quantum systems.

On/off switching of photon emission achieved via Stark effect.

Double Fano resonance observed in resonant coupled systems.

Abstract

Electro-optic control of quantum dots embedded in the plasmonic nanocavities enables active tuning of photonic devices for emerging applications in Quantum optics such as quantum information processing, entanglement and ultrafast optical switching. Here, we demonstrate the coherent control of plexcitonic states in (i) an off-resonant and (ii) a resonant coupled quantum systems through optical Stark effect (OSE). We analyze a hybrid plasmon-emitter system which exhibits tunable Fano resonance, Stark induced transparency (SIT) and vacuum Rabi splitting due to quadratic Stark shift in the degenerate states of quantum emitter (QE). In addition, a resonantly coupled system shows the signature of double Fano resonance due to Stark-induced splitting in a two-level QE. Our study shows that Stark tuning of plexcitons not only mitigates decoherence in the quantum system but it also stimulates on/off switching of spontaneous photon emission in the visible regime. Such tunable systems can be used to operate photonic integrated circuits (PIC) for applications in quantum computing and information processing.