A Self-Defocusing Effect in Series of Networks for Nano All-Optical Switching,Annalen Der Physik

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A Self-Defocusing Effect in Series of Networks for Nano All-Optical Switching
Annalen Der Physik ( IF 2.2 ) Pub Date : 2021-05-27 , DOI: 10.1002/andp.202100028
Xiaohui Xu _{1,

2} , Xiangbo Yang _{1,

2}

Affiliation

A theoretical design of all-optical switches based on series of networks (SNs) is proposed. With increment of the fractal generation, the density of loops (

d_{1} : d_{2} = 1 : 2

) in networks, which can efficiently produce antiresonances, increases exponentially, increasing switching efficiency to a high level. To acquire superior performance of the switching efficiency, the nonlinear material with negative nonlinear refractive index was chosen to insert into the networks, inducing self-defocusing effect and decreasing the transmission. Further, the SNs with a defective waveguide length create ultra-strong photonic localization and reduce the threshold energy. The switching efficiency of just the third type of SN was calculated and found to be approximately 5.25 × 10²⁶, which is nine orders of magnitude higher than that previously reported. The threshold energy of just the third type of SN is about

0.66 zJ

, which is one order of magnitude lower than that reported previously. Moreover, the switching efficiency increases monotonously, and the threshold energy decreases rapidly with increasing fractal generation.

中文翻译：

纳米全光开关网络系列中的自散焦效应

提出了一种基于系列网络（SN）的全光交换机的理论设计。随着分形生成的增加，环的密度（

d_{1} ： d_{2} = 1 ： 2

) 在网络中，可以有效地产生反谐振，呈指数增长，将开关效率提高到一个高水平。为了获得优异的开关效率性能，选择具有负非线性折射率的非线性材料插入网络，引起自散焦效应并降低透射率。此外，具有缺陷波导长度的 SN 会产生超强的光子定位并降低阈值能量。仅计算了第三类 SN 的开关效率，发现大约为 5.25 × 10 ²⁶，比之前报道的高九个数量级。仅第三类 SN 的阈值能量约为