Cascading of second-order processes in quadratic molecular media at the origin of very large cubic effects

P. Vidakovic, J. Zyss, D. Kim, W. Toruellas, G. Stegeman, W. E. Moerner, R. Twieg, G. Bjorklund

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Abstract

We have shown that very large nonlinear shifts ranging from π/4 to π/2 observed at relatively modest input intensities in single-crystal cored fibers of 4-(N,N-dimethylamino)-3-acetamidonitrobenzene (DAN) have their origin in the cascading of two second-order nonlinear processes: second-harmonic generation followed by down-frequency conversion. The nonlinear shifts and corresponding n2 values extracted from independent observationsof self-phase modulation and direct interferometric measurements are as large as 10-12 cm2/W at relatively modest input intensities from 30 to 60 MW/cm2. The cascading origin of large n2 values was fully confirmed by z-scan measurements performed on a single DAN crystal.

Original languageEnglish
Pages (from-to)303-307
Number of pages5
JournalSynthetic Metals
Volume67
Issue number1-3
DOIs
Publication statusPublished - 1994 Nov

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All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

Cite this

Vidakovic, P., Zyss, J., Kim, D., Toruellas, W., Stegeman, G., Moerner, W. E., Twieg, R., & Bjorklund, G. (1994). Cascading of second-order processes in quadratic molecular media at the origin of very large cubic effects. Synthetic Metals, 67(1-3), 303-307. https://doi.org/10.1016/0379-6779(94)90061-2