![Fig. 24.2 — Two-level atom and optical molasses](https://i0.wp.com/opticaltweezers.org/wp-content/uploads/2015/11/Fig24_2.png?fit=660%2C473)
(a) Energy levels of a two-level atomic system showing the detuning of an incident laser beam from resonance, δ = ω − ω0. (b) Configuration of laser beams for a one-dimensional optical molasses, i.e., a pair of counter-propagating beams detuned by δ from the atomic resonance. (c) Radiation force for a one-dimensional optical molasses as a function of atomic velocity. The linear region near v = 0 corresponds to viscous damping.
Fig. 24.2 — Two-level atom and optical molasses