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arXiv 0901.3244physics.optics
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周期波导中色散的近场测量提取

Dispersion extraction with near-field measurements in periodic waveguides

Andrey A. Sukhorukov, Sangwoo Ha, Ilya V. Shadrivov, David A. Powell, Yuri S. Kivshar

摘要:

我们制定和实验证明的高分辨率光谱方法的基础上布洛赫波对称性提取模式色散周期性波导的近场分布的测量。我们的传播模式和倏逝模式的特点,并确定在不同的波导配置的前向和后向波的振幅,估计精度为百分之几或更少,而常用的空间傅里叶变换(SFT)分析提供的波数分辨率,这是有限的波导长度的倒数,我们实现了精确的色散提取,即使是紧凑的光子结构。

英文摘要:

We formulate and demonstrate experimentally the high-resolution spectral method based on Bloch-wave symmetry properties for extracting mode dispersion in periodic waveguides from measurements of near-field profiles. We characterize both the propagating and evanescent modes, and also determine the amplitudes of forward and backward waves in different waveguide configurations, with the estimated accuracy of several percent or less. Whereas the commonly employed spatial Fourier-transform (SFT) analysis provides the wavenumber resolution which is limited by the inverse length of the waveguide, we achieve precise dispersion extraction even for compact photonic structures.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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