Thank you for your response.
Actually, I am stuck with the phase delay spectrum (Figure 7b).
Also, this paper worked on the unit cell, and I got the unit cell phase plot before.
If I take the radius of 235–270 nm from the above phase graph, the figure looks like:
I don't think it is a phase delay spectrum. How can I get the exact figure 7b? Could you please give me a suggestion regarding this?
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