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Forced synchronization of spaser by an external optical wave
E S Andrianov1, A A Pukhov, A V Dorofeenko
1Moscow Institute of Physics and Technology, Dolgoprudniy, Moscow Reg., Russia.
Optics Express
|January 26, 2012
Summary
Autonomous spasers show stochastic oscillations when driven by an external field with a different frequency. Plasmon oscillations synchronize with the external wave only above a threshold field amplitude, forming an Arnold tongue.
Area of Science:
- Plasmonics
- Nonlinear Optics
- Quantum Optics
Background:
- Autonomous spasers are nanoscale light sources.
- Spaser behavior can be influenced by external electromagnetic fields.
- Understanding spaser synchronization is crucial for device applications.
Purpose of the Study:
- To investigate the synchronization dynamics of autonomous spasers under external driving fields.
- To determine the conditions for frequency locking and stochastic oscillations.
- To identify the parameter space corresponding to spaser synchronization.
Main Methods:
- Numerical simulations of spaser dynamics.
- Analysis of plasmon oscillation behavior under varying external field parameters.
- Identification of synchronization regions in amplitude-frequency detuning space.
Main Results:
- Stochastic oscillations occur at low external field intensities when frequencies differ.
- Plasmon oscillations synchronize with the external field above a critical amplitude threshold.
- An 'Arnold tongue' region was identified, defining conditions for synchronization.
Conclusions:
- External field frequency and amplitude critically influence spaser dynamics.
- Spaser synchronization is a threshold phenomenon dependent on field strength.
- The identified Arnold tongue provides a roadmap for controlling spaser-field interactions.
