Collinear second harmonic generations in a nonlinear photonic quasicrystal
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Sheng, Yan
Koynov, Kaloian
Dou, Junhong
Ma, Boqin
Li, Jingjuan
Zhang, Daozhong
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American Institute of Physics
Abstract
LiNbO₃ nonlinear photonic quasicrystal with octagonal symmetry was fabricated. The collinear quasiphase matched second harmonic generations at 22 wavelengths were observed. It is shown that not only the standard type quasiphase matching but also the recently proposed projection-based quasiphase matching plays an important role in these harmonic generations.
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Applied Physics Letters
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