We demonstrate a multiwavelength achromatic meta-lens for red, green, and blue light based on multi-focal phase profile. The anisotropic rectangular nano-structure with silicon nitride is utilized for the meta-lens based on Pancharatnam-Berry phase technique. The proposed meta-lens has the focal length of 200 μ m at the maximum intensity and the numerical aperture of 0.67.

© 2018 Optical Society of Japan

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