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Optics Letters

Optics Letters


  • Editor: Xi-Cheng Zhang
  • Vol. 39, Iss. 15 — Aug. 1, 2014
  • pp: 4579–4582

Highly efficient infrared optical nonlinearity of a wide-bandgap chalcogenide Li2CdGeS4

J. I. Jang, D. J. Clark, J. A. Brant, J. A. Aitken, and Y. S. Kim  »View Author Affiliations

Optics Letters, Vol. 39, Issue 15, pp. 4579-4582 (2014)

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A quaternary chalcogenide Li2CdGeS4 is an excellent candidate for a nonlinear optical (NLO) material exhibiting wide transparency spanning from its fundamental band edge (3.15 eV) to the terahertz regime (23.5 μm). Strong optical nonlinearity of Li2CdGeS4 has been investigated over a wide spectral range (λ=1.0643.3μm) based on second- and third-harmonic generation. The compound has a high damage threshold at λ=1.064μm because of saturable three-photon absorption, and is phase-matchable for λ>1.5μm with χ(2)50pm/V. It also exhibits strong third-order nonlinearity of χ(3)105pm2/V2. Li2CdGeS4 is promising for high-power NLO applications in the broad infrared spectrum.

© 2014 Optical Society of America

OCIS Codes
(160.4330) Materials : Nonlinear optical materials
(190.2620) Nonlinear optics : Harmonic generation and mixing

ToC Category:
Nonlinear Optics

Original Manuscript: May 13, 2014
Revised Manuscript: June 24, 2014
Manuscript Accepted: June 24, 2014
Published: July 30, 2014

J. I. Jang, D. J. Clark, J. A. Brant, J. A. Aitken, and Y. S. Kim, "Highly efficient infrared optical nonlinearity of a wide-bandgap chalcogenide Li2CdGeS4," Opt. Lett. 39, 4579-4582 (2014)

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