Multi-Channel Polarization Manipulation Based on All-Dielectric Metasurface

Round 1

Reviewer 1 Report

This paper proposed a metasurface which can transmit different types of polarized waves simultaneously. Both of the theoretical analysis and simulation results are given to design and verify the metasurface. However, some minor points should be revised before publication.

1. Lin 52 and 53, the abbreviate of right-handed circular polarization should be RHCP, while left-handed circular polarizaiton is LHCP.

2. There are some key structure parameters of the metasurface. How the structure parameters affect the performance of the proposed metasurface?

3. It will be better if the authors can give a comparison between the proposed design and others in the literatures.

Author Response

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Reviewer 2 Report

The manuscript entitled “Multi-channel polarization manipulation based on all-dielectric metasurface” proposed a THz dielectric metasurface that can generate four different polarization beams at the transmission side simultaneously. However, in my opinion, this manuscript should be revised before acceptance. The comments are as follows:

1. How can the readers observe four different polarization states in Figures 4(b) and 5(b)?

2. The simulation results seem inadequate, for example, how about the efficiency and waveform of each polarization beams?

3. In this article, only the simulation results are provided to verify the performance of the proposed metasurface. Can the authors present some measured results?

4. There are some typo errors in the current version, the authors may read throughout the manuscript and correct them. For example, in Page 1, Line 35 and 36, “suffffer”, “specifific”, “confiFigureurations”; Page 5, Line 177, “Figureure”.

5. The representation of matrix, vector and variate should be distinguished and consistent over the whole context.

6. There are some puzzling sentences in the current version, for example, in Page 3, Line 117, “where m and n are either positive or negative integers or negative integers or zero” and the paragraph below Figure 2 “The incident light is perpendicular to the atomic incidence”.

 

 

Author Response

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Reviewer 3 Report

In this manuscript, entitled “Multi-channel polarization manipulation based on all-dielectric metasurface”, the authors proposed all-dielectric metasurface with four different polarization states manipulation. By rationally choosing the geometric size of unit cell, output polarization state, number of splitted beams can be achieved. In general, the innovation of this paper in not enough. Some figures and discussions of the results are insufficient. At present, I could not recommend for publication.

1. There are a lot of metasurfaces with both CP and LP polarization manipulations reported before, and I could not find the advantages of this model proposed in this paper.

2. Although this model is not proved in experiments, the feasibility of fabrication should be explained.

3. The optical parameters of the material are missing.

4. The functions of the metsurface in Figure 1 are not described clearly. Readers may be confused. What is “H+V”, “H-V”? What about LCP incident wave?

5. In Figure 2, the authors display the transmission amplitude and phase shift as a function of W and L at 1THz. It is suggested to add the S parameters (both transmission and reflection) as a function of frequency.

6. Some figures in the results should be shown more readably. Font sizes in figure 2 are inconsistent. Figure 3 is in disorder. Double coordinates in figure 3(b) should be labeled more clearly. The far field distributions of multi-beams are suggested to display in polar coordinates. Reference as Appl. Phys. Lett. 117, 074102, 2020.

7. The discussions of the results are insufficient. For example: Page 7, the authors state “four beams of different polarization states will be simultaneously generated at the transmission side”. How to prove it? Little information can be found in the figures and text. Situation is similar in Figure 5. Besides, the total efficiency of this mode is also suggested to add.

Author Response

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Author Response File: Author Response.docx

Round 2

Reviewer 3 Report

1. I could not find the reference is response 6 (nanoph-2021-0349). In Nanoscale, 2021, 13, 10898, I cannot find similar far-field figures of multiple beams. The authors should recheck it.

2. A lot of information is missing and many format errors in the references, such as Reference [8], [13],[15], [17]. The authors should check the paper from beginning to end much more carefully.

3. The sketch function of LCP incidence is suggested to add in Fig. 1.

4. What about the loss tangent of silicon?

5. I still cannot understand the four different polarization states in Figures 4(b) and 5(b). The authors should give more direct expression.

6. I do not agree “The efficiency of each of the four diffraction orders is approximately 25%.” in the response 7. The authors should give the calculated efficiency in details.

Author Response

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Author Response File: Author Response.docx