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Bistable and addressable localized vortices in semiconductor lasers.

P Genevet¹, S Barland, M Giudici

¹Université de Nice Sophia Antipolis, Institut Non-Linéaire de Nice, UMR 6618, 06560 Valbonne, France.

Physical Review Letters

|September 28, 2010

Summary

Localized emission states in semiconductor lasers were shown to carry orbital angular momentum. This enables chiral optical vortices and bistable laser pixels for advanced optical applications.

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Area of Science:

Optics and Photonics
Laser Physics
Dissipative Systems

Background:

Coupled semiconductor lasers exhibit complex emission patterns.
Localized structures in dissipative systems display unique properties like bistability.
Optical vortices are characterized by orbital angular momentum and chirality.

Purpose of the Study:

To experimentally demonstrate orbital angular momentum in localized emission states of coupled broad-area semiconductor lasers.
To investigate the properties of these chiral optical vortices within dissipative systems.
To explore the potential for creating addressable and bistable chiral laser pixels.

Main Methods:

Experimental demonstration using coupled broad-area semiconductor lasers.
Characterization of localized emission states.
Analysis of orbital angular momentum and chirality.
Investigation of coexistence with homogeneous emission and mutual independence.

Main Results:

Localized emission states in coupled semiconductor lasers were experimentally confirmed to carry finite orbital angular momentum.
These states exhibit the chirality of optical vortices.
The structures demonstrate coexistence with low-intensity homogeneous emission and mutual independence, characteristic of localized structures in dissipative systems.

Conclusions:

The findings establish a link between localized structures and optical vortices in semiconductor lasers.
This work paves the way for novel optical devices.
The development of arrays of optically addressable and bistable chiral laser pixels is now feasible.