Phys. Rev. Lett. 76, 2452–2455 (1996)Spontaneous Generation of a Longitudinal Atomic Density Grating in Sodium VaporReceived 18 July 1995; revised 6 November 1995; published in the issue dated 1 April 1996 We present measurements of probe beam amplification in Na vapor at intermediate density values, in both the counterpropagating and copropagating directions (with respect to the pump beam) in the case of degenerate pump and probe frequencies. Strong gain is observed only in the counterpropagating direction for parameters that preclude the possibility of Raman or Rayleigh gain. We show that the experimental results can be interpreted in terms of the spontaneous formation of a density grating due to the nonresonant interaction between the electromagnetic field and the atoms. © 1996 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.76.2452
DOI:
10.1103/PhysRevLett.76.2452
PACS:
34.50.-s, 42.25.Fx
See AlsoComment: P. Verkerk, N. P. Bigelow, L. De Salvo, and R. Bonifacio, Comment on ``Spontaneous Generation of a Longitudinal Atomic Density Grating in Sodium Vapor'', Phys. Rev. Lett. 79, 3094 (1997). Reply: G. L. Lippi, S. Barbay, and J. R. Tredicce, Lippi, Barbay, and Tredicce Reply:, Phys. Rev. Lett. 79, 3095 (1997). |
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