Acousto–Optic Modulation and Deflection of Terahertz Radiation
, Vasily Valerievich Gerasimov 2,3 and Ildus Shevketovich Khasanov 1,*Round 1
Reviewer 1 Report
It is very hard to understand the difference between this manuscript and the authors own work published on the same journal (reference 5 in your current manuscript): "Optimal Design of an Ultrasound Transducer for Efficient Acousto-Optic Modulation of Terahertz Radiation", published on MDPI Materials, Feb. 2022.
The work seems to be a minor improvement, at most of the previously communicated work, therefore not recommended for publishing.
Author Response
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Author Response File: 
Author Response.pdf
Reviewer 2 Report
In this work, authors perform experimental work as well as some theoretical analysis, studying the operation of an acousto-optic modulator in the THz region of the spectrum. It is experimentally shown the better performance of such device in the case where the transducer component width is smaller (only partially covered with electrodes). Indeed, the energy efficiency defined as the ratio of diffracted beam intensity to the incident beam is shown to be optimal for lower thicknesses of the latter (around 6 or 8 mm). A higher angular resolution is also estimated numerically for a sectioned transducer.
I think the work is worth of publication in materials journal, with the following minor changes.
- Despite that the authors claim their work provide improvement of the AOs performance in THz range; it is still not completely clear to what extent this is the case comparing with the literature? I therefore, request to the authors to slightly improve the introduction in that sense (showing that indeed it is the case).
- Although, it is explained how and why for lower thicknesses of the transducer (or partially covered transducer with electrodes), a higher diffraction rate is achieved, the physical mechanism is somewhat still lacking; can then authors expand a bit their explanation on this?
- At last, it would be best to specify more what experiments exactly the authors envisage to conduct in order to study sectioned transducer effect on the device (to get higher angle resolution)?
Comments for author File: Comments.pdf
Author Response
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Author Response File: Author Response.pdf
Reviewer 3 Report
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Comments for author File: Comments.pdf
Author Response
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Author Response File: Author Response.pdf
