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Spatial solitons in a pumped semiconductor resonator.

V B Taranenko, C O Weiss, W Stolz

|December 1, 2007

Summary

Bright and dark spatial solitons were observed in optically pumped semiconductor resonators. This optical pumping significantly reduced light intensity requirements and thermal issues for soliton existence.

Area of Science:

Nonlinear optics
Semiconductor physics

Background:

Spatial solitons are self-reinforcing light beams that maintain their shape.
Semiconductor resonators offer unique optical properties due to their electronic band structure.

Purpose of the Study:

To investigate the formation and characteristics of bright and dark spatial solitons in optically pumped semiconductor resonators.
To explore the impact of optical pumping on soliton stability and the required light intensities.
To analyze the influence of nonlinearities and population inversion on soliton behavior.

Main Methods:

Experimental observation of spatial solitons in a semiconductor resonator.
Optical pumping of the semiconductor material to induce nonlinear effects.
Theoretical modeling using a large-aperture semiconductor resonator model.

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Analysis of absorptive and reactive nonlinearities and their role in soliton formation.

Main Results:

Successful observation of both bright and dark spatial solitons.
Demonstration that optical pumping significantly lowers the threshold light intensity for soliton formation.
Qualitative agreement between experimental results and theoretical predictions.
Identification of the crucial role of nonlinearities and population inversion sign.

Conclusions:

Optically pumped semiconductor resonators are viable platforms for generating spatial solitons.
Optical pumping offers a method to overcome limitations of high light intensity and thermal load in soliton experiments.
The study provides insights into the fundamental mechanisms governing soliton formation in such systems.