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arXiv 0909.0556physics.optics
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周期波导中布洛赫模的近场提取

Bloch-mode extraction from near-field data in periodic waveguides

Sangwoo Ha, Andrey A. Sukhorukov, Kokou B. Dossou, Lindsay C. Botten, C. Martijn de Sterke, Yuri S. Kivshar

摘要:

我们证明,周期性结构中传播布洛赫模和消逝布洛赫模的空间分布可以从指定光波长处的单次电场测量中提取。我们开发了一个系统的提取过程,通过扩展以前开发的时间数据系列的高分辨率光谱方法的概念,考虑到布洛赫模式的对称性,同时在所有空间位置。我们将我们的方法应用到光子晶体波导接口,并确认其鲁棒性存在的噪声。

英文摘要:

We demonstrate that the spatial profiles of both propagating and evanescent Bloch-modes in a periodic structure can be extracted from a single measurement of electric field at the specified optical wavelength. We develop a systematic extraction procedure by extending the concepts of high-resolution spectral methods previously developed for temporal data series to take into account the symmetry properties of Bloch-modes simultaneously at all spatial locations. We apply our method to a photonic crystal waveguide interface and confirm its robustness in the presence of noise.

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