Chinese Journal of Lasers, Volume. 47, Issue 3, 301007(2020)
Dual-Mode Metasurface of Polarization-Specific Focusing and Keeping Wavefront
A dual-mode metasurface device is designed to achieve phase modulation with anisotropic response depending on the left and right-handed circularly polarized light. This device can control the sizes of the Si nanoblock in order to regulate the transmission phase, and require additional geometric phase by controlling its in-plane direction, simultaneously. By combining the two phases, the metasurface focuses the right-handed circularly polarized incident beam with an efficiency as high as 44.8%, while keeping the plane wavefront transmission of the left-handed circularly polarized incident beam. The designed metasurface could be used as a miniaturized polarizer in information encrypted transmission field.
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Luo Yu, Wang Wentao, Zhao Pengjiu, Liu Shoupeng, Liu Zhiying, Fu Yuegang, Chen Xiaohu. Dual-Mode Metasurface of Polarization-Specific Focusing and Keeping Wavefront[J]. Chinese Journal of Lasers, 2020, 47(3): 301007
Category: laser devices and laser physics
Received: Sep. 9, 2019
Accepted: --
Published Online: Mar. 12, 2020
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