Pogosian, T.; Ledoux-Rak, I.; Denisyuk, I.; Fokina, M.; Lai, N.D. Fabrication and Characterization of 2D Nonlinear Structures Based on DAST Nanocrystals and SU-8 Photoresist for Terahertz Application. Micromachines2024, 15, 203.
Pogosian, T.; Ledoux-Rak, I.; Denisyuk, I.; Fokina, M.; Lai, N.D. Fabrication and Characterization of 2D Nonlinear Structures Based on DAST Nanocrystals and SU-8 Photoresist for Terahertz Application. Micromachines 2024, 15, 203.
Pogosian, T.; Ledoux-Rak, I.; Denisyuk, I.; Fokina, M.; Lai, N.D. Fabrication and Characterization of 2D Nonlinear Structures Based on DAST Nanocrystals and SU-8 Photoresist for Terahertz Application. Micromachines2024, 15, 203.
Pogosian, T.; Ledoux-Rak, I.; Denisyuk, I.; Fokina, M.; Lai, N.D. Fabrication and Characterization of 2D Nonlinear Structures Based on DAST Nanocrystals and SU-8 Photoresist for Terahertz Application. Micromachines 2024, 15, 203.
Abstract
We demonstrate a method for realization of highly nonlinear optical 4-(4-dimethylaminostyryl)-1-methylpyridinium tosylate (DAST) two-dimensional structures by a double step technique. The desired polymeric structures have been first fabricated by using the multiple-exposure of 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 nonlinear conversion rates, such as terahertz generation, by using the quasi-phase matching technique.
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