A High-Sensitivity Graphene Metasurface and Four-Frequency Switch Application Based on Plasmon-Induced Transparency Effects
Round 1
Reviewer 1 Report
Comments and Suggestions for AuthorsIn this manuscript, the author proposed a graphene metasurface with induced transparency. The response frequency can be tuned by changing Fermi level of graphene and sensing performance of the proposed metasurface was investigated. This manuscript can be accepted for publication after addressing the following comments.
1. The caption of figures are not correct. The order of the graphs is also wrong.
2. I suggest the author compare the sensing performance to other graphene or induced transparency metasurfaces.
3. I don't see the advantage of using a diamond-shaped cross. I think a diamond-shaped cross also work, please give some simulation results to show the differences.
4. Some related refs can be added:Advanced Optical Materials, 2024: 2303195; Optics Express, 2024, 32(13): 23268-23279.
Comments on the Quality of English Language
None
Author Response
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Author Response.pdf
Reviewer 2 Report
Comments and Suggestions for AuthorsIn the submitted manuscript "A high-sensitivity graphene metasurface and four frequency switch application based on plasmon induced transparency effect", the authors studied a kind graphene metasurface made of diamond-shaped cross and nearly squares on silica substrate. The tunable resonance or PIT like spectrum is numerically studied for sensing functionality. In general, I think the results are interesting and the publication is recommended with some minor comments:
1. There has been a lot work on tunable PIT or EIT, the advantages of the current metasurface should be discussed.
2. The influence of the thickness of the substrate should be discussed, also the realization of the tunable PIT metausrface in experiments should be discussed including how to realized electrically tuning and how to get the high Feimi level in graphene.
3. The “nearly square” should be revised to be more suitable.
4. Some quite relevant papers on graphene metasurface and the resonance tuning should be duly referenced see .e.g. Adv. Opt. Mater. 7, 1800537 (2019); Advanced Electronic Materials 9, 2300065 (2023).
Author Response
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Reviewer 3 Report
Comments and Suggestions for AuthorsThis paper proposed a graphene metasurface with tunable PIT windows by tuning Fermi levels of the graphene. The performances of the optical modulator and refractive index sensor were investigated and compared with recently reported works. The concept of two different graphene resonators to create multi-frequency resonances is noteworthy. However, several critical issues should be addressed.
1. The paper is based on numerical simulations. However, the detailed method (for example, FEM or FDTD) and simulation conditions (grid, boundary conditions, incident field polarization...) were not specified. The simulation method should be clearly stated.
2. The diamond-shaped graphene resonator has very sharp edges and exhibits extremely strong field enhancement at the edge. Therefore, the resonance of the diamond-shaped resonator must be highly sensitive to the edge shape.
(1) Can the authors provide information on how the resonant spectrum changes with edge shape? (FWHM, wavelength,..)
(2) In fabrication, the edge must be rounded due to manufacturing limitations. The authors should discuss recent fabrication limitations.
3. Fig. 3(b-d) and text should be revised. In the text, "However, in composite structures,~as shown in Figure 3(d). ~~two bright modes." But PIT window is at 6 THz and the figure is Fig. 3(c) according to the caption.
4. In Fig.4, the parameters, gamma1, gamma2, k, E can be obtained from the fitting. The authors should comment on these values and compare them with appropriate references.
5. In Table1, the insertion loss of the proposed devices is 0.08dB, significantly lower than other literature. Can the authors comment on the low insertion loss of the device?
Author Response
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Author Response File: Author Response.pdf
Round 2
Reviewer 1 Report
Comments and Suggestions for AuthorsAll my comments are addessed. I have no more questions.
