Excited State Raman and Resonance Enhanced Three-Photon Scattering in Sodium (With 2 Figures)

Yaakov Shevy, M. Rosenbluh, Harry Friedmann

J. Zhang, P. Lambropoulos, Dino Zei +2 more

Yaakov Shevy, M. Rosenbluh, Harry Friedmann

New resonances have been observed in the fluorescence spectrum of atomic sodium, near the D lines, for both resonant and nonresonant laser excitation. The resonances are interpreted as arising from the interaction of the strong driving laser field and the three-level atom. Specifically, two simultaneously acting mechanisms are identified: resonantly enhanced three-photon scattering and excited-state Raman scattering.

Igor M. Beterov, Nikolai V. Fateev, V. P. Chebotaev

T. Takagahara

Yaakov Shevy, Harry Friedmann, M. Rosenbluh

We have observed stimulated emission from Na vapor excited by a laser tuned near the Na D lines. The stimulated-emission processes have been identified as Rayleigh scattering, excited-state Raman scattering, and ordinary as well as resonance-enhanced three-photon scattering. The observations indicate that at least part of the conical emission observed in many systems has its origin in these processes.