Plasmonic Luneburg lens and plasmonic nano-coupler Download： 691次 | Chinese Optics Letters -- 中国光学期刊网

Chinese Optics Letters, 2020, 18 (9): 092401, Published Online: Jul. 15, 2020

Plasmonic Luneburg lens and plasmonic nano-coupler Download： 691次

Lei Zhang ^1,2Lin Wang ^1,2Yanqing Wu ^1,3,*Renzhong Tai ^1,3,**

Author Affiliations

¹ Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China

² University of Chinese Academy of Sciences, Beijing 100049, China

³ Shanghai Synchrotron Radiation Facility, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai 201204, China

Figures & Tables

Fig. 1. (a) Schematic diagram for a PMLL. (b) Quarter enlarged view of the top of the dielectric film with air holes. (c) Transverse cross section of the intensity profile at the point $ρ = R$ in the $y$ direction. (d) Intensity distribution of SPPs [three-dimensional (3D) simulation] propagating along $y$ direction and passing through a PMLL. The red circle indicates the radius R of the PMLL. The red dotted circle indicates the real area of the designed lens. The white dotted line indicates the position $y = R$ .

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Fig. 2. (a), (c), (e), and (g) Transverse cross sections of the intensity profile at the point $ρ = R$ in the $y$ direction. (b), (d), (f), and (h) Intensity distributions of SPPs (3D simulation) propagating along $y$ direction and passing through the PMLL with different heights. The red circles indicate the radius R of the PMLL. The red dotted circles indicate the real area of the designed lens. The white dotted lines indicate the position $y = R$ .

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Fig. 3. (a) and (e) Schematic diagram for a PMLL. (b) and (f) Quarter enlarged view of the top of the PMMA film with air holes. (c) and (g) Transverse cross section of the intensity profile at the point $ρ = R$ in the $y$ direction. (d) and (h) Intensity distributions of SPPs (3D simulation) propagating along $y$ direction and passing through a PMLL. The red circles indicate the radius R of the PMLL. The red dotted circles indicate the real area of the designed lens. The white dotted lines indicate the position $y = R$ .

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Fig. 4. (a) Schematic diagram for a taper. (b) Schematic diagram for a PMLL coupler. (c) Transverse cross section of the electric field profile at the position $y = 7 μ m$ . (d) Electric field profile of SPPs propagating along $y$ direction, passing through a taper coupler, and coupled to the 40 nm wide waveguide. (e) Transverse cross section of the electric field profile at the position $y = 7 μ m$ . (f) Electric field profile of SPPs propagating along $y$ direction, passing through a PMLL, and coupled to the 40 nm wide waveguide. The red circle indicates the position of the PMLL, and the white dotted line indicates the position of the monitor.

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Fig. 5. The performance of the PMLL coupler and taper coupler based on 3D simulations in a broad bandwidth.

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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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