Temporal Optical Solitons Due to Kerr and Quintic Nonlinearities in Coupled Quantum Wells

TL;DR

This paper investigates the generation, stability, and modulation instability suppression of ultraslow bright optical solitons in asymmetric three-coupled quantum wells, emphasizing the roles of Kerr and quintic nonlinearities.

Contribution

It introduces a new model for ultraslow bright optical solitons in coupled quantum wells considering both Kerr and quintic nonlinearities, with numerical stability analysis.

Findings

Solitons are stable under certain conditions.

Quintic nonlinearity suppresses modulation instability.

Solitons can be generated and propagated in the system.

Abstract

The possibility of generation and propagation of ultraslow bright optical solitons in asymmetric three-coupled quantum well systems is studied in this paper. These bright solitons owe their existence to Kerr and quintic nonlinearities which arise due to a probe pulse and two controlling laser beams. We also demonstrate numerically that these solitons are stable. The modulation instability of a continuous or quasi-continuous wave probe beam has been also investigated and the role of quintic nonlinearity in suppressing this instability addressed.