Autler–Townes effect

In spectroscopy, the Autler–Townes effect, named after American physicists Stanley Autler and Charles Townes, is a type of the dynamical (also known as AC) Stark effect, corresponding to the case when an oscillating electric field (e.g., that of a laser) is tuned in resonance (or close) to the transition frequency of a given spectral line, and resulting in a change of the shape of the absorption/emission spectra of that spectral line.

References

• Autler, S. H; Charles Hard Townes (1955). "Stark Effect in Rapidly Varying Fields". Physical Review (American Physical Society) 100 (2): 703–722. Bibcode:1955PhRv..100..703A. doi:10.1103/PhysRev.100.703. 

• Cohen-Tannoudji et al., Mécanique Quantique, Vol 2, p 1352, Herman, Paris 2000