Phys. Rev. Lett. 77, 2416–2419 (1996)Product State Control through Interfering Excitation RoutesReceived 29 March 1996; published in the issue dated 16 September 1996 We have demonstrated control over the branching ratio for photoionization into two different continuum channels of atomic barium using an interference between two distinct photoexcitation routes. Each pathway for photoionization is a two-photon process, and is resonantly enhanced by an intermediate state. We have found the unexpected situation of destructive interference when both lasers are resonant with their respective transitions. The magnitude of the interference, as well as the exceptionally broad wavelength range over which the interference persists, is also quite surprising. © 1996 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.77.2416
DOI:
10.1103/PhysRevLett.77.2416
PACS:
32.80.Qk, 32.80.Fb
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