Quasi-Phase-Matched Third-Harmonic Generation in a Quasi-Periodic Optical Superlattice
Shining ZhuNational Laboratory of Solid State Microstructures, Nanjing University, Nanjing 210093, China, and Center for Advanced Studies in Science and Technology of Microstructures, Nanjing 210093, ChinaYong‐yuan ZhuNational Laboratory of Solid State Microstructures, Nanjing University, Nanjing 210093, China, and Center for Advanced Studies in Science and Technology of Microstructures, Nanjing 210093, ChinaNai‐Ben MingNational Laboratory of Solid State Microstructures, Nanjing University, Nanjing 210093, China, and Center for Advanced Studies in Science and Technology of Microstructures, Nanjing 210093, China
1997en
ABI
Abstract
Quasi-periodic structure can be introduced into nonlinear optical materials such as LiTaO 3 crystals. Such structures were used for quasi–phase-matching second-harmonic generation. These materials are now shown to be able to couple second-harmonic generation and sum-frequency generation through quasi–phase-matching. The approach led to a direct third-harmonic generation with high efficiency through a coupled parametric process. The result verifies that high-order harmonics may be generated in a quadric nonlinear medium by a number of quasi–phase-matching processes, and therefore, exhibits a possible important application of quasi-periodic structure materials in nonlinear optics.
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