split ring resonator (SRR) simulated by HFSS

I would like to reproduce the results in the following paper.
This is a standard SRR structure, but just for Terahertz region.
I have constructed an initial project, however it can not give a very agreement with experiments.
Anyone can help me revise it and then make the simulation reproduce the experimental results.

Thanks very much.

https://www.edaboard.com/ftopic169368.html

Hi, cuongtran,

Thanks for your reply. Yes I notice your correct SRR, and it looks very similar with mine. But it is not well in agreement with experiment results.
If possible, could you take a look at my project. Thank you very much.