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arXiv 2007.11311physics.optics
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两平行纳米纤维导模间的耦合

Coupling between guided modes of two parallel nanofibers

Fam Le Kien, Lewis Ruks, Sile Nic Chormaic, Thomas Busch

摘要:

我们研究了两个相同的平行纳米纤维的基本导模之间的耦合解析和数值。我们计算的系数的方向耦合,对接耦合,和模式的能量变化的函数的光纤半径,光波长,和光纤的间隔距离。我们表明,由于系统的对称性,一个模式的主准线性偏振沿径向或切向轴对齐的一个双折射耦合到只有模式与相同的相应的主偏振的其他双折射。我们发现,当光纤半径较小时,光波长较大时,或者光纤间距较小时,光场的对接耦合和模能量变化对功率传输的影响是显著的。我们表明,当光纤半径,光波长,或光纤间隔距离变化时,功率传输系数可能达到局部最大值或变为零,这表明该系统可以用于距离或波长测量的计量。

英文摘要:

We study the coupling between the fundamental guided modes of two identical parallel nanofibers analytically and numerically. We calculate the coefficients of directional coupling, butt coupling, and mode energy changes as functions of the fiber radius, the light wavelength, and the fiber separation distance. We show that, due to the symmetry of the system, a mode of a nanofiber with the principal quasilinear polarization aligned along the radial or tangential axis is coupled only to the mode with the same corresponding principal polarization of the other nanofiber. We find that the effects of the butt coupling and the mode energy changes on the power transfer are significant when the fiber radius is small, the light wavelength is large, or the fiber separation distance is small. We show that the power transfer coefficient may achieve a local maximum or become zero when the fiber radius, the light wavelength, or the fiber separation distance varies indicating the system could be used in metrology for distance or wavelength measurements.

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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