Phys. Rev. A 64, 041801(R) (2001) [4 pages]Observation of absorptive photon switching by quantum interference
We report an experimental demonstration of photon switching by quantum interference in a four-level atomic system proposed by Harris and Yamamoto [Phys. Rev. Lett. 81, 3611 (1998)]. Quantum interference inhibits single-photon absorption but enhances third-order, two-photon-type absorption in the four-level system. We have observed greatly enhanced nonlinear absorption in the four-level system realized with cold 87Rb atoms and demonstrated fast switching of the nonlinear absorption with a pulsed pump laser. © 2001 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevA.64.041801
DOI:
10.1103/PhysRevA.64.041801
PACS:
42.50.Gy, 42.50.Hz, 32.80.-t
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