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Cavity solitons in semiconductor microresonators: existence, stability, and dynamical properties
Maggipinto1, Brambilla, Harkness
1INFM, Dipartimento di Fisica Interateneo, Universita e Politecnico di Bari, Via Orabona 4, 70126 Bari, Italy.
Summary
This study confirms the existence and stability of cavity solitons (CS) in semiconductor microresonators. These robust optical solitons are stable due to a "neutral mode," enabling applications in optical information processing.
Area of Science:
- Nonlinear Optics
- Semiconductor Physics
- Photonics
Background:
- Cavity solitons (CS) are localized light structures with potential for optical data processing.
- Understanding their stability and dynamics is crucial for practical applications.
Purpose of the Study:
- To establish the existence and analyze the dynamical stability of cavity solitons in semiconductor microresonators.
- To investigate the role of neutral modes in CS stability and motion.
- To explore the phase space landscape of coexisting solutions.
Main Methods:
- A versatile numerical technique based on Newton's method was employed.
- Linearized operators were evaluated to determine eigenvalues and assess stability.
- The dynamics of CS under external perturbations were analyzed.
Main Results:
- The existence of stable and robust cavity solitons was confirmed in GaAs-based microresonators.
- A zero eigenvalue associated with a neutral mode governs CS translation under perturbations.
- The unstable CS solution acts as a separatrix between homogeneous and soliton solutions.
Conclusions:
- Cavity solitons in semiconductor microresonators are dynamically stable and robust.
- The neutral mode dictates CS response to external influences, enabling controlled movement.
- These findings pave the way for advanced optical information processing applications.