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Peer-Review Record

High-Sensitivity Phase Detection of Reflection-Type Guided-Mode Resonance Sensor Based on Rotating Azimuth Angle Using a Heterodyne Interferometer

by Jaturon Tongpakpanang and Wen-Kai Kuo *
Reviewer 1: Anonymous
Reviewer 2: Anonymous
Submission received: 7 January 2022 / Revised: 30 January 2022 / Accepted: 31 January 2022 / Published: 3 February 2022

Round 1

Reviewer 1 Report

In this manuscript, the phase properties of scanned azimuth angles for different incident angles were investigated by theoritical analysis and experiment. Then a high-sensitivity phase-detection system for a reflection-type GMR sensor was successfully demonstrated.

I have some concerns about this manuscript:

  1. the author said that their system has high detection sensitivity, what is its level comparing with other gas sensing technique?
  2. Page 4, "Figure 2. (a) AFM surface morphology of the fabricated" should be revised as "Figure 4. (a) AFM surface morphology of the fabricated".
  3. Page 5, Fig5b, whether the label of the longitudinal axis is “phase difference”?
  4. Page 5,Fig6a,What is the unit of “amplitude” in the longitudinal axis?or is it the normalized reflectiviy?
  5. According to Fig6c,the fluctuation of phase is far greater than 0.01 degree,so the detection limit is not easy to be reduced.

Author Response

Please see the attachment.

Author Response File: Author Response.pdf

Reviewer 2 Report

Figures in the manuscript are not numbered correctly!

Fig. 2 c) in section 3: What is the EOM signal frequency used in the lock-in detection?

Line 182: "CO2 ppm..." - number 2 should be a sub-index

 

Author Response

Please see the attachment.

Author Response File: Author Response.pdf

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