It is shown in this letter related to the paper by M.V.&nbs;Rybin and M.F. Limonov [Physics—Uspekhi 62 (8) (2019)] that in dielectric sub-wavelength resonators of equal volume but different shape no eigen-modes exist that would be qualitatively different from those in dielectric spheres. In particular, there are no 'super-resonant' modes in dielectric cylinders whose Q-factor would exceed that of similar modes in dielectric spheres of the same volume.

Keywords: nano-optics, dielectric sub-wavelength resonators, eigen-modes, Q-factors PACS: 42.25.−p, 42.70.Qs, 78.67.−n, 78.67.Pt (all) DOI: 10.3367/UFNe.2019.05.038619 URL: https://ufn.ru/en/articles/2019/10/k/ 000508386600011 2-s2.0-85080926335 2019PhyU...62.1058K Citation: Klimov V V "On the existence of 'super-resonant' states in sub-wavelength dielectric resonators and their relation to bound states in the continuum" Phys. Usp. 62 1058–1059 (2019) BibTexBibNote ® (generic)BibNote ® (RIS)MedlineRefWorks Received: 24th, April 2019, accepted: 30th, May 2019 Оригинал: Климов В В «О существовании "суперрезонансных" состояний в субволновых диэлектрических резонаторах и их связи со связанными состояниями в континууме» УФН 189 1131–1133 (2019); DOI: 10.3367/UFNr.2019.05.038619