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Open waveguide cavity using a negative index medium

机译:使用负折射率介质打开波导腔

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摘要

An open waveguide cavity formed by a pair of planar waveguides, in which one guiding layer is a negative index medium and the other is a positive index medium, is theoretically demonstrated. For such a waveguide cavity the resonant frequency is independent of the total length of the waveguide system. With the coupled mode theory it is shown that energy flow circulation can be established through the special coupling between the waveguides at the resonant frequency, and thus the wave fields are localized. This phenomenon is further verified numerically with the finite-difference time-domain method. The quality factor of the open waveguide cavity is also discussed.
机译:理论上说明了由一对平面波导形成的开放波导腔,其中一个引导层是负折射率介质,另一个是正折射率介质。对于这样的波导腔,谐振频率与波导系统的总长度无关。利用耦合模式理论,表明可以通过谐振频率下的波导之间的特殊耦合来建立能量流循环,从而将波场局部化。使用时域有限差分方法进一步验证了这种现象。还讨论了开放波导腔的品质因数。

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