title: Dispersion management of anisotropic metamirror for super-octave bandwidth polarization conversion.
abstract: Dispersion engineering of metamaterials is critical yet not fully released in applications where broadband and multispectral responses are desirable. Here we propose a strategy to circumvent the bandwidth limitation of metamaterials by implementing two-dimensional dispersion engineering in the meta-atoms. Lorentzian resonances are exploited as building blocks in both dimensions of the dedicatedly designed meta-atoms to construct the expected dispersion. We validated this strategy by designing and fabricating an anisotropic metamirror, which can accomplish achromatic polarization transformation in 4-octave bandwidth (two times of previous broadband converters). This work not only paves the way for broadband metamaterials design but also inspire potential applications of dispersion management in nano-photonics.
authors: 1] State Key Laboratory of Optical Technologies on Nano-Fabrication and Micro-Engineering, Institute of Optics and Electronics, Chinese Academy of ScienceP.O. Box 350, Chengdu 610209, China [2] Center for Information Photonics &Communications, School of Information Science &Technology, Southwest Jiaotong University, Chengdu, Sichuan, 610031, China.
authors: Yinghui
authors: Y
authors: Guo
authors: State Key Laboratory of Optical Technologies on Nano-Fabrication and Micro-Engineering, Institute of Optics and Electronics, Chinese Academy of ScienceP.O. Box 350, Chengdu 610209, China.
authors: Yanqin
authors: Y
authors: Wang
authors: State Key Laboratory of Optical Technologies on Nano-Fabrication and Micro-Engineering, Institute of Optics and Electronics, Chinese Academy of ScienceP.O. Box 350, Chengdu 610209, China.
authors: Mingbo
authors: M
authors: Pu
authors: State Key Laboratory of Optical Technologies on Nano-Fabrication and Micro-Engineering, Institute of Optics and Electronics, Chinese Academy of ScienceP.O. Box 350, Chengdu 610209, China.
authors: Zeyu
authors: Z
authors: Zhao
authors: State Key Laboratory of Optical Technologies on Nano-Fabrication and Micro-Engineering, Institute of Optics and Electronics, Chinese Academy of ScienceP.O. Box 350, Chengdu 610209, China.
authors: Xiaoyu
authors: X
authors: Wu
authors: State Key Laboratory of Optical Technologies on Nano-Fabrication and Micro-Engineering, Institute of Optics and Electronics, Chinese Academy of ScienceP.O. Box 350, Chengdu 610209, China.
authors: Xiaoliang
authors: X
authors: Ma
authors: State Key Laboratory of Optical Technologies on Nano-Fabrication and Micro-Engineering, Institute of Optics and Electronics, Chinese Academy of ScienceP.O. Box 350, Chengdu 610209, China.
authors: Changtao
authors: C
authors: Wang
authors: Center for Information Photonics &Communications, School of Information Science &Technology, Southwest Jiaotong University, Chengdu, Sichuan, 610031, China.
authors: Lianshan
authors: L
authors: Yan
authors: State Key Laboratory of Optical Technologies on Nano-Fabrication and Micro-Engineering, Institute of Optics and Electronics, Chinese Academy of ScienceP.O. Box 350, Chengdu 610209, China.
authors: Xiangang
authors: X
authors: Luo