Design and analyses of an ultra-thin flat lens for wave front shaping in the visible

作者：Huang Kai; Li Yiyan; Tian Xuelong^*; Zeng Dajun; Gao Xueli

来源：Physics Letters, Section A: General, Atomic and Solid State Physics , 2015, 379(45-46): 3008-3012.

DOI：10.1016/j.physleta.2015.08.022

• Moment method
• Focal plane
• Nanoantenna
• Phase discontinuities
• Snell's law

An ultra-thin flat lens is proposed for focusing circularly polarized light in the visible range. Anisotropic C-shaped nanoantennas with phase discontinuities are used to form the metasurface of the lens. The phase response of the C-shaped nanoantennas can be manipulated by simply rotating the angle of the unit nanoantenna. A 600 nm incident circularly polarized light is focused by the proposed techniques. Good agreements are observed by using our MoM and a commercial FDTD software package. The computation time spent by using MoM is approximately 10-100 times smaller than using FDTD. All the results show the proposed nanoantenna array has a great potential for nanoscale optical microscopy, solar cell energy conversion enhancement, as well as integrated optical circuits.

• 出版日期2015-12-4
• 单位重庆大学