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Asymmetric excitable phase triggering in an optically injected semiconductor laser
Optics Letters
|January 15, 2021
Summary
Researchers discovered that optical phase perturbations can deterministically trigger excitable dynamics in quantum dot lasers. This study reveals two asymmetric thresholds and an unobserved upper limit for perturbation amplitude, advancing the understanding of excitability.
Area of Science:
- Nonlinear Dynamics
- Quantum Optics
- Semiconductor Lasers
Background:
- Excitability is characterized by a threshold, the minimum perturbation needed for a response.
- Dual state quantum dot lasers exhibit stochastic excitable dynamics.
Purpose of the Study:
- To investigate deterministic triggering of excitable dynamics in optically injected dual state quantum dot lasers.
- To analyze the role of optical phase perturbations in controlling excitable behavior.
- To identify and characterize excitable thresholds in this system.
Main Methods:
- Optical injection into a dual state quantum dot laser.
- Application of controlled optical phase perturbations.
- Analysis of system dynamics and response to perturbations.
Main Results:
- Deterministic triggering of stochastic excitable dynamics was achieved using optical phase perturbations.
- Two asymmetric excitable thresholds were identified, corresponding to perturbation direction.
- An excitable interval was observed for fast perturbations, with an amplitude limit above which excitations cease.
Conclusions:
- Optical phase perturbations offer a method for deterministic control of excitable dynamics in quantum dot lasers.
- The discovery of asymmetric thresholds and an upper perturbation limit expands the understanding of excitability phenomena.
- This work provides new insights into the fundamental mechanisms of excitable systems.
