Table 2 Comparison between some published works and our work.

From: Single-cell bilayer design of a terahertz six-channel metasurface for simultaneous holographic and grayscale images

References

Channel number

Bandwidth

Imaging quality

Efficiency

9

4

450–630 nm

Good

Unmentioned

11

2

480–680 nm

Good

7%

12

3

432–633 nm

Good

13.1%

13

6

532 nm

Good

16.4%

14

6

671 nm

Good

9.47%

18

3

633 nm

Good

Unmentioned

34

3

480–610 nm

Good

8.94%

Our work

6

0.9–1.4 THz

Good

> 48%

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