Ultratransparent photonic crystals realize positive and negative refractions

被引：0
作者：
Peng, Yiwei
Sheng, Jie
Xie, Jianlan
Yu, Junzhe
Liu, Jianjun [1 ]
机构：
[1] Hunan Univ, Sch Phys & Elect, Key Lab Micro Nano Optoelect Devices, Minist Educ, Changsha 410082, Peoples R China
来源：
JOURNAL OF OPTICS | 2023年 / 25卷 / 11期
基金：
中国国家自然科学基金;
关键词：
negative refraction; ultratransparent; photonic crystals; metamaterials; BROAD-BAND; INDEX; ANGLE; LENS;
D O I：
10.1088/2040-8986/acf055
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
The introduction of ultratransparent medium has not yet solved the problem of transmission loss caused by reflection in negative refraction (NR) devices. In this study, theoretical analysis and simulation verification are carried out and an ultratransparent medium with wide-angle NR-index is proposed; the imaging with its flat lens is discussed. A photonic crystal (PC) is designed as an instance of the medium, and the rationality was analyzed. The PC can realize NR within 50 & DEG; as well as positive refraction (PR) within 75 & DEG; with transmittances over 99%. It is an ideal material for multifunctional NR/PR devices with ultra-low loss.
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页数：7
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