Design of a high-forward-transmission all-optical diode based on cascaded side-coupled photonic crystal cavities
Design of a high-forward-transmission all-optical diode based on cascaded side-coupled photonic crystal cavities
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DOI：
10.1364/josab.34.002493
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发表时间：
2017-12
影响因子：
1.9
通讯作者：
Takanori Sato;T. Fujisawa;K. Saitoh
中科院分区：
文献类型：
--
作者：
Takanori Sato;T. Fujisawa;K. Saitoh
提出了一种基于级联光子晶体腔的高正向传输全光二极管。为了获得高前向传输和大的非互易性，我们通过级联两个侧面耦合的光子晶体腔来生成盒状光谱。我们发现，通过适当调整两个腔体之间的距离，可以获得高对比度的透射率和几乎100%透射率的平坦光谱线形。这些特性对于实现高正向传输和大的不可逆性是优选的。数值结果表明，所设计的全光二极管具有完美的传输性能，不可逆传输比>50 dB。
A high-forward-transmission all-optical diode based on cascaded photonic crystal cavities is proposed. To obtain a high forward transmission and a large nonreciprocity, we generate a box-like spectrum by cascading two side-coupled photonic crystal cavities. We find that by appropriately adjusting the distance between two cavities, a high contrast of the transmission and a flat spectral lineshape with almost 100% transmission can be obtained. These characteristics are preferable for achieving a high forward transmission and a large nonreciprocity. Numerical results show that the designed all-optical diode performs perfect transmission with a large nonreciprocal transmission ratio of >50 dB.