Broadband non-polarizing terahertz beam splitters with variable split ratio
Type
ArticleAuthors
Wei, MingguiXu, Quan
Wang, Qiu
Zhang, Xueqian
Li, Yanfeng

Gu, Jianqiang

Tian, Zhen
Zhang, Xixiang

Han, Jiaguang

Zhang, Weili
KAUST Department
Material Science and Engineering ProgramPhysical Science and Engineering (PSE) Division
Date
2017-08-15Online Publication Date
2017-08-15Print Publication Date
2017-08-14Permanent link to this record
http://hdl.handle.net/10754/625360
Metadata
Show full item recordAbstract
Seeking effective terahertz functional devices has always aroused extensive attention. Of particular interest is the terahertz beam splitter. Here, we have proposed, designed, manufactured, and tested a broadband non-polarizing terahertz beam splitter with a variable split ratio based on an all-dielectric metasurface. The metasurface was created by patterning a dielectric surface of the N-step phase gradient and etching to a few hundred micrometers. The conversion efficiency as high as 81% under the normal incidence at 0.7 THz was achieved. Meanwhile, such a splitter works well over a broad frequency range. The split ratio of the proposed design can be continuously tuned by simply shifting the metasurface, and the angle of emergences can also be easily adjusted by choosing the step of phase gradients. The proposed design is non-polarizing, and its performance is kept under different polarizations.Citation
Wei M, Xu Q, Wang Q, Zhang X, Li Y, et al. (2017) Broadband non-polarizing terahertz beam splitters with variable split ratio. Applied Physics Letters 111: 071101. Available: http://dx.doi.org/10.1063/1.4986538.Sponsors
This work was supported by the National Key Basic Research Program of China (Grant No. 2014CB339800), the National Science Foundation of China (Grant Nos. 61422509, 61420106006, and 61427814), and the U.S. National Science Foundation (Grant No. ECCS-1232081).Publisher
AIP PublishingJournal
Applied Physics LettersAdditional Links
http://aip.scitation.org/doi/10.1063/1.4986538ae974a485f413a2113503eed53cd6c53
10.1063/1.4986538