High-Sensitivity Phase Detection of Reflection-Type Guided-Mode Resonance Sensor Based on Rotating Azimuth Angle Using a Heterodyne Interferometer
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:
- the author said that their system has high detection sensitivity, what is its level comparing with other gas sensing technique?
- Page 4, "Figure 2. (a) AFM surface morphology of the fabricated" should be revised as "Figure 4. (a) AFM surface morphology of the fabricated".
- Page 5, Fig5b, whether the label of the longitudinal axis is “phase difference”?
- Page 5,Fig6a,What is the unit of “amplitude” in the longitudinal axis?or is it the normalized reflectiviy?
- 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