CPC G02B 26/06 (2013.01) [G02B 1/002 (2013.01); G02B 2207/101 (2013.01)] | 30 Claims |
1. A meta-optical device comprising:
a plurality of phase modulation areas arranged in a first direction and configured to modulate a phase of an incident light, each of the plurality of phase modulation areas comprising a plurality of nanostructures; and
a compensation area located between a kth phase modulation area and a (k+1)th phase modulation area adjacent to each other, from among the plurality of phase modulation areas, and comprising a compensation structure for buffering an effective refractive index change occurring in a boundary area between the kth phase modulation area and the (k+1)th phase modulation area according to respective rules of the kth phase modulation area and the (k+1)th phase modulation area,
wherein N is a number of the plurality of phase modulation areas, k and N are natural numbers, and k is equal to or greater than 1 and less than N,
wherein the plurality of phase modulation areas have a circular shape or an annular shape surrounding the circular shape, and the first direction is a radial direction that extends from a center of the circular shape toward a boundary of the meta-optical device, and
wherein sizes of the plurality of nanostructures in the kth phase modulation area change according to a first pattern in the radial direction, sizes of the plurality of nanostructures in the (k+1)th phase modulation area change according to a second pattern in the radial direction, and a size of the compensation structure located between the kth phase modulation area and the (k+1)th phase modulation area does not follow the first pattern and the second pattern.
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