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Nonlinear polarization bistability in optical nanowires.

Wen Qi Zhang, M A Lohe, Tanya M Monro

|February 18, 2011

Summary

Structural anisotropic nonlinearities in optical nanowires cause unstable polarization states with periodic bistable behavior. These nonlinearities lead to bistable states and kink solitons in continuous wave systems.

Area of Science:

Nonlinear optics
Condensed matter physics
Photonics

Background:

Optical nanowires exhibit complex nonlinear phenomena.
Understanding polarization dynamics is crucial for optical device applications.
Isotropic materials can display anisotropic nonlinearities under specific conditions.

Purpose of the Study:

To investigate the emergence of structural anisotropic nonlinearities in isotropic optical nanowires.
To analyze the resulting unstable polarization states and their behavior.
To identify and characterize bistable states and kink solitons.

Main Methods:

Utilizing the full vectorial nonlinear Schrödinger equations.
Employing a Lagrangian formulation for continuous wave analysis.

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Solving nonlinear equations to determine system dynamics.

Main Results:

Demonstrated the existence of structural anisotropic nonlinearities in isotropic optical nanowires.
Observed unstable polarization states exhibiting periodic bistable behavior.
Identified bistable states and kink solitons as limiting forms.

Conclusions:

Structural anisotropy in nonlinearities can induce complex polarization dynamics in optical nanowires.
The system supports bistable states and kink solitons, offering potential for novel optical functionalities.
Vectorial nonlinear Schrödinger equations provide a robust framework for analyzing these phenomena.