• Chinese Optics Letters
  • Vol. 18, Issue 9, 092401 (2020)
Lei Zhang1、2, Lin Wang1、2, Yanqing Wu1、3、*, and Renzhong Tai1、3、**
Author Affiliations
  • 1Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China
  • 2University of Chinese Academy of Sciences, Beijing 100049, China
  • 3Shanghai Synchrotron Radiation Facility, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai 201204, China
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    Abstract

    In a single nanoscale device, surface plasmon polaritons (SPPs) have potential to match the different length scales associated with photonics and electronics. In this Letter, we propose an accurate design of a plasmonic metasurface Luneburg lens (PMLL) accommodating SPPs. The simulations indicate that the full width at half-maximum is 0.42 μm, and the focus efficiency is 78%. The characters of a PMLL have robustness to manufacturing errors. The PMLL is applied in a 10 μm long compact coupler model, which couples the SPPs to the 40 nm wide output waveguide. The couple efficiency is higher than that of a conventional taper coupler in a broad bandwidth. The design is compatible with standard lithography technology.
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    Lei Zhang, Lin Wang, Yanqing Wu, Renzhong Tai. Plasmonic Luneburg lens and plasmonic nano-coupler[J]. Chinese Optics Letters, 2020, 18(9): 092401
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    Category: Plasmonics and Metamaterials
    Received: Apr. 7, 2020
    Accepted: May. 9, 2020
    Posted: Jul. 13, 2020
    Published Online: Jul. 15, 2020
    The Author Email: Yanqing Wu (wuyanqing@sinap.ac.cn), Renzhong Tai (tairenzhong@zjlab.org.cn)