Abstract

Abstract: We present a harmonic generation experiment using liquid H₂O and D₂O interrogated by a mid-infrared, 3.66 μm, laser at a maximum intensity of 8x10¹³ W/cm². The unique aspects of the experiment include the long wavelength and short (9 cycle-110 fs) pulse duration of the laser as well as the near-resonant excitation of the H₂O and D₂O vibrational modes. We observe up to the 13th harmonic order in H₂O and intensity scaling is consistent with a direct perturbative process up to the 9th harmonic order. Phase matching and resonant absorption are unable to account for the observed differences in harmonic yields between samples.

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History
Original Manuscript: June 25, 2009
Manuscript Accepted: September 1, 2009
Revised Manuscript: August 7, 2009
Published: November 2, 2009

References

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Author Affiliations

Terry A. Miller

Department of Chemistry, The Ohio State University, Columbus, Ohio 43210, USA

Anthony D. DiChiara, Emily Sistrunk, Pierre Agostini, Louis F. DiMauro

Department of Physics, The Ohio State University, Columbus, Ohio 43210, USA

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