Nonlinear photonic crystals for deep ultraviolet coherent light sources

本研究的目的是通过提出一种结合PhC功能和高度非线性光学材料的新型二维PhC结构来制备非线性二维光子晶体（PhCs）。我们揭示了观察到的非线性光学响应与相应的光子带结构之间的直接关系，并且我们展示了实验证据，证明在这种结构中，非线性光学应用（如波长转换和双光子吸收器件）的性能得到了显着改善。此外，利用这种物理增强机制，我们展示了高效，紧凑的深紫外（DUV）相干波长转换器件。

The aim of this research project is to fabricate nonlinear two-dimensional (2D) photonic crystals (PhCs) by proposing a new 2D PhC structure that combines PhC functions and highly nonlinear optical materials. We reveal a direct relationship between the observed nonlinear optical responses and the corresponding photonic band structure, and we show experimental evidence that the performance of nonlinear optical applications such as the wavelength conversion and two-photon absorption devices are dramatically improved in this structure. Moreover, by using this physical enhancement mechanism, we demonstrate the high-efficiency, compact deep-ultraviolet (DUV) coherent wavelength conversion devices.