Photoassociation dynamics driven by a modulated two-color laser field
Abstract
Photoassociation (PA) dynamics of ultracold cesium atoms steered by a modulated two-color laser field E(t)=E0f(t)cos((2π)/(Tp)-φ)cos(ωLt) is investigated theoretically by numerically solving the time-dependent Schrödinger equation. The PA dynamics is sensitive to the phase of envelope (POE) φ and the period of the envelope Tp, which indicates that it can be controlled by varying POE φ and period Tp. Moreover, we introduce the time- and frequency-resolved spectrum to illustrate how the POE φ and the period Tp influence the intensity distribution of the modulated laser pulse and hence change the time-dependent population distribution of photoassociated molecules. When the Gaussian envelope contains a few oscillations, the PA efficiency is also dependent on POE φ. The modulated two-color laser field is available in the current experiment based on laser mode-lock technology.
- Publication:
-
Physical Review A
- Pub Date:
- November 2011
- DOI:
- 10.1103/PhysRevA.84.053418
- Bibcode:
- 2011PhRvA..84e3418Z
- Keywords:
-
- 32.80.Qk;
- 34.50.Rk;
- 82.50.Hp;
- 82.53.Kp;
- Coherent control of atomic interactions with photons;
- Laser-modified scattering and reactions;
- Processes caused by visible and UV light;
- Coherent spectroscopy of atoms and molecules