Phys. Rev. B 33, 6954–6961 (1986)Far-infrared nonlinear optics. I. χ(2) near ionic resonanceReceived 12 November 1985; published in the issue dated 15 May 1986 Frequency doubling is used to determine absolutely χ(2)(2ω,ω,ω) of GaAs and LiTaO3 at far-infrared frequencies, 20≤ω≤57 cm-1. Resonant enhancement is observed in LiTaO3 as an ionic resonance is approached. The technique employed in this study is extendable to the 200-cm-1 range, where it appears feasible to experimentally distinguish between mixed electronic-ionic contributions such as the third-order lattice potential and second-order dipole moment. © 1986 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevB.33.6954
DOI:
10.1103/PhysRevB.33.6954
PACS:
63.20.-e, 78.30.Gt, 42.65.Ky
See AlsoSee Also: A. Mayer and F. Keilmann, Far-infrared nonlinear optics. II. χ(3) contributions from the dynamics of free carriers in semiconductors, Phys. Rev. B 33, 6962 (1986). |
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