Subwavelength light bending by metal slit structures.
Subwavelength light bending by metal slit structures.
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DOI：
10.1364/opex.13.009652
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发表时间：
2005-11
期刊：
影响因子：
3.8
通讯作者：
Tae-woo Lee;S. Gray
中科院分区：
文献类型：
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作者：
Tae-woo Lee;S. Gray
我们讨论了光如何可以有效地弯曲纳米尺度宽度的狭缝波导在金属。讨论是基于精确的数值解的麦克斯韦方程。我们的结果，使用一个现实的模型银在光学波长，表明良好的直角弯曲传输波长λ> 600 nm可以实现。在较低波长处也会出现近似的阻带，这可以部分地通过色散曲线分析来理解。弯曲效率与内弯曲角处的聚焦效应相关。最后，我们表明，良好的弯曲传输甚至可以产生的U形转弯结构。
We discuss how light can be efficiently bent by nanoscale-width slit waveguides in metals. The discussion is based on accurate numerical solutions of Maxwell's equations. Our results, using a realistic model for silver at optical wavelengths, show that good right-angle bending transmission can be achieved for wavelengths lambda> 600 nm. An approximate stop-band at lower wavelengths also occurs, which can be partly understood in terms of a dispersion curve analysis. The bending efficiency is shown to correlate with a focusing effect at the inner bend corner. Finally, we show that good bending transmission can even arise out of U-turn structures.