Femtosecond soliton diode on heterojunction Bragg-grating structure

被引：8
|
作者：
Deng, Zhigui [1 ]
Lin, Haolin [1 ]
Li, Hongji [2 ]
Fu, Shenhe [3 ]
Liu, Yikun [2 ]
Xiang, Ying [4 ]
Li, Yongyao [1 ]
机构：
[1] South China Agr Univ, Coll Elect Engn, Dept Appl Phys, Guangzhou 510642, Guangdong, Peoples R China
[2] Sun Yat Sen Univ, State Key Lab Optoelect Mat & Technol, Guangzhou 510275, Guangdong, Peoples R China
[3] Jinan Univ, Dept Optoelect Engn, Guangzhou 510632, Guangdong, Peoples R China
[4] Guangdong Univ Technol, Sch Informat Engn, Guangzhou 510006, Guangdong, Peoples R China
来源：
APPLIED PHYSICS LETTERS | 2016年 / 109卷 / 12期
关键词：
OPTICAL ISOLATION; LIQUID-CRYSTAL; ISOLATORS; FILTERS;
D O I：
10.1063/1.4962898
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
We numerically propose a scheme for realizing an all-optical femtosecond soliton diode based on a tailored heterojunction Bragg grating, which is designed by two spatially asymmetric chirped cholesteric liquid crystals. Our simulations demonstrate that with the consideration of optical nonlinearity, not only the femtosecond diode effect with nonreciprocal transmission ratio up to 120 can be achieved but also the optical pulse evolving into soliton which maintains its shape during propagation through the sample is observed. Further, the influence of pulse width and the carrier wavelength to the femtosecond diode effect is also discussed in detail. Our demonstrations might suggest a direction for experimentally realizing the femtosecond soliton diode based on the cholesteric liquid crystals. Published by AIP Publishing.
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页数：4
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