Figure 4 | Scientific Reports

Figure 4

From: Cavity-enhanced metallic metalens with improved Efficiency

Figure 4

(a,b) Simulated E-field distribution in the BLM with a period of 400 nm and a separation thickness of 140 nm (optimal) in x-z and y-z planes, respectively, as excited by a circular polarized illumination at λ0 = 632.8 nm. (c,d) The corresponding simulated results of the un-optimized cavity (t1 = 80 nm), where the E-field is much weaker than that in optimized case. All the electrical field are normalized in same scale.

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