Perfect Invisibility Modes in Dielectric Nanofibers

Round 1

Reviewer 1 Report

In this manuscript, the authors studied the properties of the perfect invisible mode of the proposed optical structure analytically and numerically. The idea and the results are of interested to me. However, before recommending the acceptance of this manuscript, the author should well address the following issues:

1、  The keywords are too much, less than 6 keywords are better.

2、  In Fig.11(a), the authors are asked to investigate the invisible properties of the structure with a tilted angle.

3、  The author are suggest to discuss more about the application of the proposed structure.

Author Response

"Please see the attachment."

Author Response File: Author Response.pdf

Reviewer 2 Report

Scattering of a plane wave by a dielectric sphere is known to be described by the Mie theory, which uses the Bessel functions for the field inside the particle and the Hankel functions for the field in the outer space. Klimov (Ref. [35, 36]) drew attention to the fact that in addition to such classical solutions of the Maxwell equations, there are also special solutions in which the field outside the sphere is described by a superposition of solutions that are nonsingular in unbounded free space, including inside the nanoparticle. This approach is fundamentally different from the usual approach using the Sommerfeld boundary conditions, in which it is assumed that the functions describing the fields outside the body have singularities when analytically continued into the region inside the particle. Klimov demonstrated that for a dielectric sphere such ideal non-radiating modes exist, decrease at infinity, and their natural frequencies are real, which corresponds to infinite Q-factors. The article by Klimov and Guzatov uses the same idea that was used in previous articles by Klimov (Ref. [35, 36]). In this case, the idea of ideal nonradiative modes is applied to dielectric cylinders, including cylinders with an elliptical profile. It is clear that ideal non-radiating modes do not exist for absorbing media. But solutions close to these ideal ones are of interest, since they allow one to increase the quality factors of the corresponding resonators, as well as the boundary states in continuum. I recommend this article for publication.

Author Response

We are grateful to reviewer 2 for the high appraisal of our work.

Reviewer 3 Report

Please refer to the attachment.

Comments for author File: Comments.pdf

Author Response

"Please see the attachment."

Author Response File: Author Response.pdf

Round 2

Reviewer 1 Report

I would like to suggest the accaptance of this manuscript, since all the issues I concern are well addressed.

Reviewer 3 Report

It can be accepted.