Nonreciprocal cavities and the time-bandwidth limit: comment

Kosmas L. Tsakmakidis; Yun You; Tomasz Stefański; Linfang Shen

doi:10.1364/optica.384840

Nonreciprocal cavities and the time-bandwidth limit: comment

Abstrakt

In their paper in Optica 6, 104 (2019), Mann et al. claim that linear, time-invariant nonreciprocal structures cannot overcome the time-bandwidth limit and do not exhibit an advantage over their reciprocal counterparts, specifically with regard to their time-bandwidth performance. In this Comment, we argue that these conclusions are unfounded. On the basis of both rigorous full-wave simulations and insightful physical justifications, we explain that the temporal coupled-mode theory, on which Mann et al. base their main conclusions, is not suited for the study of nonreciprocal trapped states, and instead direct numerical solutions of Maxwell’s equations are required. Based on such an analysis, we show that a nonreciprocal terminated waveguide, resulting in a trapped state, clearly outperforms its reciprocal counterpart; i.e., both the extraordinary time-bandwidth performance and the large field enhancements observed in such modes are a direct consequence of nonreciprocity.

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Wersja publikacji: Accepted albo Published Version
Licencja: Copyright (2020 Optical Society of America)

Słowa kluczowe

PHOTONICS

Informacje szczegółowe

Kategoria:: Publikacja w czasopiśmie
Typ:: artykuły w czasopismach
Opublikowano w:: Optica nr 7, strony 1097 - 1101,
ISSN: 2334-2536
Język:: angielski
Rok wydania:: 2020
Opis bibliograficzny:: Tsakmakidis K., You Y., Stefański T., Shen L.: Nonreciprocal cavities and the time-bandwidth limit: comment// Optica -Vol. 7,iss. 9 (2020), s.1097-1101
DOI:: Cyfrowy identyfikator dokumentu elektronicznego (otwiera się w nowej karcie) 10.1364/optica.384840
Weryfikacja:: Politechnika Gdańska