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Peer-Review Record

Reconfigurable Terahertz Moiré Frequency Selective Surface Based on Additive Manufacturing Technology

Appl. Sci. 2023, 13(5), 3302; https://doi.org/10.3390/app13053302
by Redwan Ahmad 1, Mariia Zhuldybina 1,2, Xavier Ropagnol 1,3, Ngoc Duc Trinh 2, Chloé Bois 2, Juan Schneider 4 and François Blanchard 1,*
Reviewer 1: Anonymous
Reviewer 2:
Appl. Sci. 2023, 13(5), 3302; https://doi.org/10.3390/app13053302
Submission received: 31 January 2023 / Revised: 27 February 2023 / Accepted: 2 March 2023 / Published: 5 March 2023
(This article belongs to the Special Issue Printed Function Sensors and Materials)

Round 1

Reviewer 1 Report

The authours designed and fabricated terahertz (THz) frequency selective surface (FSS) based on two distinct additive manufacturing technologies, namely, printable electronics (PE) and three-dimensional (3D) printingThe filtering characteristics of both types of FSSs were verified through calculation, simulation and experiments. The strength of this work is the perfect verification of the theoretical and experimental parts. However, this work lacks a certain theoretical basis, and this paper needs further modification. I propose a major correction.

1suggested that the author reorganize the logic of the introduction. Try to list the research status at home and abroad in recent years.

2It is suggested that the fonts of all the diagrams in the manuscript should be consistent with those in the text.

3The conclusion part is too long, it is difficult to extract the key points, and it is not conducive to make a summary of the full text.

5It is suggested that the author accurately modify the format of the references.

6It is suggested that the 4As the superposition angle increases, the number of smaller groups with new periodic patterns also increases. Please explain the theoretical basis of this phenomenon.

author try to cite articles with high impact factors in the field in recent years.

7Please explain the absorption characteristics of THz wave in different substrates. Why PET substrate is used in this paper.

 

8、The language of the manuscript and the figure captions should be improved. All figure captions should be further improved to contain more detailed information to avoid misunderstanding. For example, caption of Figure 5.

 

9The authors are asked to classify the different characteristics of printable electronic (PE) and three-dimensional (3D) printable terahertz (THz) frequency selective surfaces (FSS) for two different additive manufacturing techniques, preferably in tabular form.

 

Comments for author File: Comments.pdf

Author Response

Please see attachment,

Author Response File: Author Response.pdf

Reviewer 2 Report

This work proposes and fabricates a terahertz (THz) frequency selective surface (FSS) using printed electronics and three-dimensional (3D) printing. The effect of Moiré interference is studied by staking two identical FSSs and rotating the orientation of the second FSS with an angle from 0° to 90° relative to the first FSS. The tunable intensity is achieved via the Moiré pattern. The design, theoretical analysis, and numerical analysis of FSS based on the Moiré pattern are demonstrated clearly in this work. However, several previous works have published the same method of fabrication of metamaterials based on printed electronics. Therefore, I would like to recommend the manuscript can be accepted after major revision. My comments are listed as follows:     

 

1.      Several previous works about the fabrication of Terahertz metamaterials via printed electronics [Applied Physics Letters 102, no. 12 (2013): 121101], [Appl. Phys. Lett 103, no. 21 (2013): 211106], and [npj Flexible Electronics 4, no. 1 (2020): 21] have been published. What is the novelty of this work apart from the proposed fabrication method of metamaterial? Could the author put a brief introduction about this?

 

2.      The image scale of the Moiré pattern in Figure 3 is not the same, so I suggest the author put the simulated Moiré pattern image in the same size scale and put the description angle inset the Figure.  

 

3.      How is the Moiré pattern fabricated? For example, does the author print the silver layer of the FSS two times in the same substrate? Could the author present the captured image of the Moiré pattern?

 

4.      The transmission of Moiré patterned metamaterial shifts to a large frequency with increasing orientation angle of the second FSS, as presented in Figure 5(a). The author should discuss the reasons for the frequency shift in the results and discussions section.

 

5.      The author presents the increasing modulation depth of Moiré patterned metamaterial with increasing the orientation angle of the second FSS. Could the author discuss the Q factor of the transmission spectra of the proposed metamaterial? The discussion of the Q factor is fascinating to enhance the discussion section.

 

 

6.      To help the readers have a more comprehensive understanding of the new research on metamaterials, I suggest supplementing some latest works about biosensors with large refractive-index sensitivities [Photonics Research 9, no. 10 (2021): 1970-1978], Electronically controlled flexible terahertz metasurface [Optics Letters 47, no. 1 (2022): 94-97], Moiré-driven electromagnetic responses of a sandwiched hyperbolic metasurface [Photonics Research 10, no. 9 (2022): 2056-2065], Terahertz liquid crystal programmable metasurface [Optics Letters 47, no. 7 (2022): 1891-1894] and terahertz metalens [Photonics Research 10, no. 4 (2022): 886-895].

Comments for author File: Comments.pdf

Author Response

Please see attachment.

Author Response File: Author Response.pdf

Round 2

Reviewer 1 Report

I don't have any opinion.

Reviewer 2 Report

All replies satisfy me. I would like to recommend the publication of the current manuscript in the journal.

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