Manipulation of a Fano resonance:
Absorption of a short light pulse by atoms can give produce a photoelectron spectrum with asymmetric peaks known as Fano resonances (e.g. close to 26eV in the picture). An additional strong laser field at variable delay (horizontal axis) manipulates the Fano lineshape.
[Picture by Jing Zhao 2012. Click here for original article in New J. of Phys.]