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Design of Multifunctional Janus Metasurface Based on Subwavelength Grating
Ji, Ruonan1; Jin, Chuan2; Song, Kun1; Wang, Shao-Wei3; Zhao, Xiaopeng1
Source PublicationNANOMATERIALS
Contribution Rank2

In this paper, a Janus metasurface is designed by breaking the structural symmetry based on the polarization selection property of subwavelength grating. The structure comprises three layers: a top layer having a metallic nanostructure, a dielectric spacer, and a bottom layer having subwavelength grating. For a forward incidence, the metal-insulator-metal (MIM) structure operates as a gap plasmonic cavity if the linearly polarized (LP) component is parallel to the grating wires. It also acts as a high-efficiency dual-layer grating polarizer for the orthogonal LP component. For the backward incidence, the high reflectance of the grating blocks the function of the gap plasmonic cavity, leading to its pure functioning as a polarizer. A bifunctional Janus metasurface for 45 degrees beam deflector and polarizer, with a transmission of 0.87 and extinction ratio of 3840, is designed at 1.55 mu m and is investigated to prove the validity of the proposed strategy. Moreover, the proposed metasurface can be cascaded to achieve more flexible functions since these functions are independent in terms of operational mechanism and structural parameters. A trifunctional Janus metasurface that acts as a focusing lens, as a reflector, and as a polarizer is designed based on this strategy. The proposed metasurface and the design strategy provide convenience and flexibility in the design of multifunctional, miniaturized, and integrated optical components for polarization-related analysis and for detection systems.

Keywordmetasurface polarization deflector lens
Indexed BySCI
WOS IDWOS:000643371300001
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Cited Times:4[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Corresponding AuthorJi, Ruonan
Affiliation1.Northwestern Polytech Univ, Sch Phys Sci & Technol, Smart Mat Lab, Xian 710129, Peoples R China
2.Xian Inst Opt & Precis Mech CAS, State Key Lab Transient Opt & Photon, Xian 710119, Peoples R China
3.Chinese Acad Sci, Shanghai Inst Tech Phys, State Key Lab Infrared Phys, Shanghai 200083, Peoples R China
Recommended Citation
GB/T 7714
Ji, Ruonan,Jin, Chuan,Song, Kun,et al. Design of Multifunctional Janus Metasurface Based on Subwavelength Grating[J]. NANOMATERIALS,2021,11(4).
APA Ji, Ruonan,Jin, Chuan,Song, Kun,Wang, Shao-Wei,&Zhao, Xiaopeng.(2021).Design of Multifunctional Janus Metasurface Based on Subwavelength Grating.NANOMATERIALS,11(4).
MLA Ji, Ruonan,et al."Design of Multifunctional Janus Metasurface Based on Subwavelength Grating".NANOMATERIALS 11.4(2021).
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