Observation of absorptive photon switching by quantum interference

Details Observation of absorptive photon switching by quantum interference Observation of absorptive photon switching by quantum interference

2001-05-21

arxiv.org/abs/physics/0105065v1

Physics

Atomic Physics

12 pages, 4 figures

Scientific paper

10.1103/PhysRevA.64.041801

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.

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