Enhanced Absorptance of 45# Steel by Laser-Induced Periodic Surface Structures (LIPSS)
, Jintian Bian 1,2,*, Xin Li 1,2,*, Hui Kong 1,2, Lei Wang 1,2, Xi Wang 1,2 and Xiaoquan Sun 1,2,*
Round 1
Reviewer 1 Report
The manuscript entitled “Enhanced absorptance of 45# steel by laser-induced 3 periodic surface structures (LIPSS)” discusses the absorptance of 45# steel irradiated by 10 ns linearly polarized pulses with fluence closes 17 to the zero-probability damage threshold. Steel samples exhibited four different kinds of 18 surface structures in the spot area. The samples’ absorptance was improved by 38 %. This study is interesting and presents novelty.The only minor unclear things to me is the format of reference 19. It would be better to be written more clear. Therefore, I recommend the publication of this manuscript.
Author Response
Dear professor，
Thank you for your review! I have coorected the mistake you pointed out.
Sincerely Yours,
Tianyu Wang
Reviewer 2 Report
I attach a pdf file with my comments.
Comments for author File: 
Comments.pdf
Author Response
The enclosure PDF is my modification explanation.
Author Response File: Author Response.pdf
Reviewer 3 Report
The paper shows that specific periodic surface morphology structures produced by laser beam-metal interaction, called LIPPS, increase the 'absorptance' of laser light by the 45# steel. This research was carried out probably in context of laser processing/machining or with some military applications in mind. The context of this research (why this is worth to study) should be given in the introduction. This is an empirical study, no fundamental considerations are presented regarding the mechanisms involved, but generally the results presented in Fig. 7 look convincing. The paper is sound, minor improvements would be desirable: some English phrases/formulations used in the text sound peculiar.
Author Response
Dear professor,
Thank you for your review.Your suggestions are very important for improving the level of my article. I have added some application scenarios in the introduction part as your advice.
Sincerely yours,
Tianyu Wang
Round 2
Reviewer 2 Report
I confirm that you have improved the manuscript.
Note: In the legend of Figure 7, delete "data4" for the star point.
