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Optics Letters

Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Editor: Alan E. Willner
  • Vol. 35, Iss. 16 — Aug. 15, 2010
  • pp: 2750–2752

Rapid passage signals induced by chirped quantum cascade laser radiation: K state dependent-delay effects in the ν 2 band of NH 3

J. H. Northern, G. A. D. Ritchie, E. P. Smakman, J. H. van Helden, J. Cockburn, and G. Duxbury  »View Author Affiliations


Optics Letters, Vol. 35, Issue 16, pp. 2750-2752 (2010)
http://dx.doi.org/10.1364/OL.35.002750


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Abstract

In this Letter, a 10 μm quantum cascade laser operating in the intrapulse mode is used observe rapid passage (RP) effects within a 40 cm single-pass gas cell containing low pressures of NH 3 . The laser tuning range allows the rotational states J = 2 with K = 0 , 1, and 2 to be probed. We show that the RP structures change as a function of optical density and that the magnitude of the delay in the switch from absorption to emission as a function of increased gas pressure is dependent upon the initial value of K. These measurements are qualitatively well modeled using the Maxwell–Bloch equations.

© 2010 Optical Society of America

OCIS Codes
(020.1670) Atomic and molecular physics : Coherent optical effects
(020.3690) Atomic and molecular physics : Line shapes and shifts
(300.6360) Spectroscopy : Spectroscopy, laser

ToC Category:
Atomic and Molecular Physics

History
Original Manuscript: May 3, 2010
Revised Manuscript: July 14, 2010
Manuscript Accepted: July 15, 2010
Published: August 12, 2010

Citation
J. H. Northern, G. A. D. Ritchie, E. P. Smakman, J. H. van Helden, J. Cockburn, and G. Duxbury, "Rapid passage signals induced by chirped quantum cascade laser radiation: K state dependent-delay effects in the ν2 band of NH3," Opt. Lett. 35, 2750-2752 (2010)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-35-16-2750

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