Skip to main content
. Author manuscript; available in PMC: 2014 Jan 14.
Published in final edited form as: Nat Photonics. 2013 Apr 28;7:449–453. doi: 10.1038/nphoton.2013.97

Figure 1. Principle of the saturated transient absorption microscopy.

Figure 1

(a) Illustration of the saturation effect in a two level electronic transition. Pump and probe photons are indicated by red and green arrows, respectively. (b) Brief layout of the setup. The dash line indicates that the pump beam is modulated. (c) The pulse train of pump, saturation and probe beam at the focused doughnut-shape region (left panel) and at the very center of the focal spot (middle panel). The modulation transfer from pump to probe only occurs at the center where the saturation field intensity close to zero (right panel).