首页> 外文会议>Conference on Integrated Optics Devices Ⅴ Jan 23-25, 2001, San Jose, USA >Photonic band-gap structures in planar nonlinear waveguides: application to second harmonic generation
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Photonic band-gap structures in planar nonlinear waveguides: application to second harmonic generation

机译:平面非线性波导中的光子带隙结构:在二次谐波产生中的应用

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Second harmonic generation (SHG) in planar nonlinear waveguides is investigated under conditions for which the use of a linear grating fabricated on top of the waveguide reproduces a photonic band-gap structure. The fundamental mode of the guide, at the fundamental frequency, is tuned at the photonic band edge resonance thus experiencing a great confinement and enhancement of the electromagnetic field inside the structure. The linear grating alone is however not able to produce both field confinement and phase-matching of the SHG process. Phase-matching is obtained by an additional modulation of the non linear susceptibility chi~((2)) as in the conventional quasi-phase-matching scheme. The conversion efficiency achieved using both linear and nonlinear gratings is orders of magnitude greater than that of a quasi-phase-matched device of the same length.
机译:在条件下研究平面非线性波导中的二次谐波(SHG),在这种条件下,使用在波导顶部制造的线性光栅可产生光子带隙结构。波导的基本模式在基本频率处在光子带边缘共振处被调谐,因此经历了结构内部电磁场的极大限制和增强。然而,仅线性光栅不能同时产生SHG工艺的场限制和相位匹配。像常规准相位匹配方案一样,通过对非线性磁化率chi〜((2))进行额外的调制来获得相位匹配。使用线性和非线性光栅实现的转换效率要比相同长度的准相位匹配器件的转换效率高几个数量级。

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