Investigation of fast light in three-layer waveguides composed of negative- refraction claddings and an air core

被引:0
作者
Zhao, Zeyang [1 ,2 ]
Pan, Guangwu [1 ,2 ]
Qiu, Weibin [1 ,2 ]
Wang, Zeyu [1 ,2 ]
Ren, Junbo [1 ,2 ]
Zhou, Hengjie [1 ,2 ]
Qiu, Pingping [3 ,4 ]
Kan, Qiang [3 ,4 ]
机构
[1] Huaqiao Univ, Coll Informat Sci & Engn, Fujian Key Lab Light Propagat & Transformat, Xiamen 361021, Fujian, Peoples R China
[2] Fujian Key Lab Semicond Mat & Applicat, Xiamen 361005, Fujian, Peoples R China
[3] Univ Chinese Acad Sci, Coll Mat Sci & Optoelect Technol, Beijing 100086, Peoples R China
[4] Chinese Acad Sci, Inst Semicond, Beijing 100086, Peoples R China
关键词
air core; fast light; negative index; photonic crystal; SLOW LIGHT; PERMEABILITY; INFORMATION;
D O I
10.1088/1361-6463/ab3f6c
中图分类号
O59 [应用物理学];
学科分类号
摘要
An optical medium with abnormal dispersion supports fast light, which possesses a group velocity faster than the speed of light in a vacuum or even takes on a negative value (a backward wave), and shows exceptional promise for optoelectronic applications. In this article, three-layer dielectric waveguides composed of negative refraction cladding, which is made tip of silicon crystal, and an air core are constructed, where the so-called fast light can propagate a backward wave by modifying the thickness of the air core. The dispersion properties of the fast light are investigated analytically. Finally, numerical results are derived by using the finite-element method to verify the analytical results. The proposed structure might find applications in the field of photonic integrated circuits.
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页数:8
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