Ultrawide Photonic Bandgap and Ultrastrong Photonic Localization Produced by Series of Periodic Networks,Annalen Der Physik

当前位置： X-MOL 学术 › Ann. Phys. (Berlin) › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

Ultrawide Photonic Bandgap and Ultrastrong Photonic Localization Produced by Series of Periodic Networks
Annalen Der Physik ( IF 2.2 ) Pub Date : 2021-04-19 , DOI: 10.1002/andp.202000584
Xiaohui Xu _{1,

2} , Xiangbo Yang _{1,

2} , Dongmei Deng ₁ , Hongzhan Liu ₁ , Zhongchao Wei ₁

Affiliation

A series of periodic networks is designed, in which all of the unit cells construct a series of fractal triangles, and their extraordinary optical characteristics for producing ultrawide photonic bandgap (PBG) and ultrastrong photonic localization are investigated. The results indicate that with increasing fractal generation, the number of equivalent triangular loops increases exponentially, and consequently the gap–midgap ratio of the PBG produced by the networks with the integer waveguide length ratio of 1:2 enlarges rapidly and tends to the limit at 200%. For the networks with the noninteger waveguide length ratio of

1 : 2 \pm Δ d

(where

0 < Δ d \leq 10^{- 2}

), an extremely narrow passband occurs in the middle of the wide PBG. Furthermore, the ultrastrong photonic localization is generated when the electromagnetic wave with the frequency of the all-transmission peak in the ultranarrow passband propagates in the networks. This type of fractal triangular networks may have applications to design all-optical devices, such as highly sensitive optical filters, highly sensitive all-optical switches, and high-performance photonic energy-storage devices.

中文翻译：

一系列周期网络产生的超宽光子带隙和超强光子定位

设计了一系列周期性网络，其中所有单元格构建了一系列分形三角形，并研究了它们产生超宽光子带隙（PBG）和超强光子定位的非凡光学特性。结果表明，随着分形生成的增加，等效三角形环的数量呈指数增加，因此整数波导长度比为 1:2 的网络产生的 PBG 的间隙-中间隙比迅速扩大并趋于极限200%。对于具有非整数波导长度比的网络