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Nonchaotic laser pulse dissociation through deformed tori.
Emanuel F de Lima1, R Egydio de Carvalho2, M D Forlevesi2
1Departamento de Física, Universidade Federal de São Carlos São Carlos SP 13565-905, Brazil.
Physical Review. E
|March 15, 2020
Summary
Researchers propose a new, controlled method for dissociating diatomic molecules using precisely designed laser pulses. This nonchaotic approach offers an alternative to existing dissociation techniques by guiding molecular trajectories.
Area of Science:
- Chemical Physics
- Molecular Dynamics
- Laser-Matter Interactions
Background:
- The nonlinear dynamics of diatomic molecules interacting with laser fields are complex.
- The driven Morse oscillator model is a standard framework for studying molecular behavior under external fields.
Purpose of the Study:
- To investigate the influence of laser fields and dipole functions on the dynamics of diatomic molecules.
- To explore a controlled, nonchaotic method for inducing molecular dissociation.
Main Methods:
- Utilizing the driven Morse oscillator model for classical dynamics simulations.
- Analyzing the deformation of invariant tori under intense and high-frequency laser fields.
- Identifying conditions where invariant tori cross the separatrix into bound and unbound regions.
Main Results:
- Intense, high-frequency laser fields can cause invariant tori to cross the separatrix.
- This crossing allows trajectories to access both bound and unbound regions of the interatomic potential.
- A controlled dissociation mechanism based on designed laser pulses is proposed.
Conclusions:
- Laser-induced dissociation can be achieved through a controlled, nonchaotic pathway.
- This method provides an alternative to chaotic multiphoton dissociation and chirped pulse dissociation.
- The study highlights the potential for precise control over molecular dissociation using tailored laser pulses.
