publication detail

Fabrication and Characterization of 2D Nonlinear Structures Based on DAST Nanocrystals and SU-8 Photoresist for Terahertz Application

AUTHORS

  • Pogosian Tamara
  • Ledoux-Rak Isabelle
  • Denisyuk Igor
  • Fokina Maria
  • Lai Ngoc Diep

KEYWORDS

  • Nonlinear optics
  • DAST
  • Nanocrystals
  • Nonlinear grating
  • QPM

    • Document type

    Journal articles

    Résumé

    We demonstrate a method for the realization of highly nonlinear optical 4-(4-dimethylaminostyryl)- 1-methylpyridinium tosylate (DAST) two-dimensional structures by a double-step technique. The desired polymeric structures were first fabricated by using the multiple exposure of the two-beam interference technique, and the DAST nanoscrystals were then prepared inside the air-voids of these photoresist templates, resulting in nonlinear periodic structures. The nonlinear properties were characterized by optical and scanning microscopies, as well as by second-harmonic generation technique. This nonlinear modulation is very promising for the enhancement of nonlinear conversion rates, such as terahertz generation, by using the quasi-phase matching technique.

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