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. 2019 Jul 10;9(7):993. doi: 10.3390/nano9070993

Figure 3.

Figure 3

(a) The layout of the single wavelength tunable duplex metalens (M1, M2). The metalens is divided into two equal sections A and B, composed of unit cells U1. (b) The phase profile of metalens M1 along the x axis while y = 0, the central position of the metalens is at (0, 0). (c), (e) and, (f) adhere to the same conditions. (c) The phase profile of metalens M2. (d) The layout of the dual wavelength tunable duplex metalens (M3, M4). Section A is constructed with unit cells U1 and section B is constructed with unit cells U2. (e) The phase profile of metalens M3. (f) The phase profile of metalens M4.