High-Sensitivity Sensor Based on Diametrical Graphene Strip Plasma-Induced Transparency

Round 1

Reviewer 1 Report

The manuscript "High sensitivity sensor based on diametrical graphene strips plasma induced transparency" has an important and actual subject of the research field.

The work presume two parallel graphene strips structures are adopted to achieve tunable plasma-induced transparency (PIT) in the terahertz band. 

The performance of the PIT system can be controlled by tuning the geometrical parameters of the structure.

In addition, the resonant frequency of the PIT window can be dynamically adjusted by changing the chemical potential and carrier mobility of the graphene strips.

A Lorentzian oscillation coupling model is fitted to the simulation results of the proposed structure by the finite-difference time-domain (FDTD) method, which are in good agreement with simulation results.

This PIT effect-based graphene microstructure has important implications in the future design of terahertz modulators, optical switches, and ultrasensitive sensors.

The general presented of the manuscript is at very good level.

The references are relevant and well distributed on work.

 

Author Response

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Author Response File: Author Response.pdf

Reviewer 2 Report

The work is devoted to the theoretical study of a sensor based on diametrical graphene strips plasma induced transparency (PIT). Two parallel graphene strips structures in THz range were studied.  PIT window appears due to the weak hybridization between them. However, in my opinion, the authors have already considered this effect in an even more complex structure, so they need to clearly indicate sufficient differences from their previous article (Ge, J.; You, C.; Feng, H.; Li, X.; Wang, M.; Dong, L.; Veronis, G.; Yun, M. Tunable dual plasmon-induced transparency based on  a monolayer graphene metamaterial and its terahertz sensing performance. Optics Express. 2020, 28(21), 31781).

Author Response

 "Please see the attachment."

Author Response File: Author Response.pdf

Reviewer 3 Report

Thank you for your effort and interesting work.

I have some comments that must be considered in the revised version of your paper.

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1) I think the first sentence in (Abstract) misses the word (sensor)...

In this paper, two parallel graphene strips structures are adopted to achieve tunable plasma-induced transparency (PIT) ((((sensor)))) in the terahertz band.

2) In (Introduction), you wrote:

"the PIT devices because it can be actively tuned by 61 controlled Fermi energy levels [21-23]".

Your work needs to clarify how this (your) sensor is tuned. Is it manually tuned? or automatically tuned?

3) In Fig. 2, please explain how did you get the imaginary part of refractive index (through Eq. 6) and what is its significance?

4) Figure 4 assures the agreement between modeling and simulation. Very Good.

5) Figures 5+6+7+8+9+10 present the results obtained at different values of affecting parameters. Your work is compared by your work but at different input data. Can you please compare with (at least one) previously published results to check the correctness of you results?

6) The conclusion must include more numerical values of the main findings.

7) Out of 48 references, you have 1 ref. in 2023, 2 refs. in 2022 and 2 refs. in 2021......... Can you please use more (recent) references.

 

 

Author Response

 "Please see the attachment."

Author Response File: Author Response.pdf

Round 2

Reviewer 2 Report

Since authors have revised the manuscript considering my comments, therefore I recommend the manuscript for publication in this journal.