Phys. Rev. A 64, 043807 (2001) [4 pages]Suppression of two-photon absorption by quantum interferenceReceived 19 March 2001; published 17 September 2001 Electromagnetically induced transparency may lead to suppression of two-photon absorption in a four-level atomic system. This phenomenon is manifested by destructive quantum interference among multiple excitation paths created by a coherent coupling field. We report an experimental observation of such suppression of two-photon absorption in cold 87Rb atoms. © 2001 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevA.64.043807
DOI:
10.1103/PhysRevA.64.043807
PACS:
42.50.Gy, 42.50.Hz, 32.80.-t
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