Formation of photonic band gaps by direct destructive interference

被引：0
|
作者：
Zhu, Pengbo [1 ]
Chen, Runkai [1 ]
Yang, Xiangbo [1 ]
Fan, Yanglong [1 ]
Lian, Huada [1 ]
Wang, Zhen-yu [2 ,3 ,4 ,5 ]
机构：
[1] South China Normal Univ, Sch Informat & Optoelect Sci & Engn, Guangdong Prov Key Lab Nanophoton Funct Mat & Dev, Guangzhou 510006, Peoples R China
[2] South China Normal Univ, Key Lab Atom & Subatom Struct & Quantum Control, Minist Educ, Guangzhou 510006, Peoples R China
[3] South China Normal Univ, Sch Phys, Guangzhou 510006, Peoples R China
[4] South China Normal Univ, Guangdong Prov Key Lab Quantum Engn & Quantum Mat, Guangzhou 510006, Peoples R China
[5] South China Normal Univ, Guangdong Hong Kong Joint Lab Quantum Matter, Guangzhou 510006, Peoples R China
来源：
OPTICS EXPRESS | 2023年 / 31卷 / 26期
基金：
中国国家自然科学基金;
关键词：
SPONTANEOUS EMISSION; STRONG ATTENUATION; LOCALIZATION; TRANSMISSION; NETWORKS;
D O I：
暂无
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
We study a photonic band gap (PBG) material consisting of multiple waveguides. The multiconnected waveguides provide different paths for direct wave interference within the material. Using coaxial cables as waveguides, we are able to tune the PBG of the material. Using direct destructive interference between different paths of the waveguides, we experimentally observe a kind of PBG which is quite different from the traditional PBG that is caused by scattering in dielectrics with inhomogeneous refractive indices. Particularly, this newly observed PBG has an extremely strong wave attenuation, making electromagnetic (EM) waves in the PBG cannot even pass through one unit cell under certain conditions. We also systematically investigate the transmission of EM waves in our PBG materials and discuss the mechanism of band gap formation. Our results provide a new insight to develop new band gap materials for photons and phonons.
引用
收藏
页码：43390 / 43400
页数：11
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