Electromagnetic pulse transparency in coupled cavity arrays through dispersion management

TL;DR

This paper theoretically explores how dispersion management in coupled cavity arrays can enable electromagnetic pulse transparency, revealing conditions for slow-light solitons and transparency windows relevant for quantum device design.

Contribution

It predicts the emergence of slow-light self-induced transparency solitons and transparency windows in coupled cavity arrays with dispersion management, a novel insight for quantum photonics.

Findings

Short pulses exhibit linear dispersion with a finite photonic band gap.

Transparency depends on pulse width, with a critical threshold for transparency windows.

Predicted effects could inform future quantum technological device design.

Abstract

We theoretically demonstrated the possible emergence of slow-light self-induced transparency solitons in the infinite one-dimensional coupled cavity array, with each cavity containing a single qubit. We have predicted a substantial dependence of pulse transparency on its dimensionless width $\tau_0$. In particular, short pulses whose widths range from $\tau_0\ll 1$ to $\tau_0\lesssim 1$ exhibit simple, almost linear dispersion law with a finite frequency gap of the order of the cavity array photonic band gap. That is, the medium is opaque for very short pulses with carrier wave frequency below the photonic gap. When the pulse width exceeds the critical one, a twin transparency window separated by a finite band gap appears in the soliton pulse dispersion law. Observation of predicted effects within the proposed setup would be of interest for understanding the properties of self-induced transparency effect in general and future applications in the design of quantum technological devices.