There is an important meaning that studying the dispersive and nonlinearphenomena of photonic crystals for the fabrication and integration of optical apparatuses.
Because of efficient concentration of light power, many nonlinear surface opticalphenomena will be significantly enhanced.
由于表面波可以有效地聚集光能量，这导致很多非线性表面光学现象被显著的提高。
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As a special kind of transparent material, nonlinearoptical crystal may induce some more phenomena when femtosecond laser pulse propagate in it because of its peculiar structure.