Tunable localization of light using nested invisible metasurface cavities

An invisible cavity is an open resonant device that confines a localized field without producing any scattering outside of the device volume. By exploiting the scatter-less property of such device, it is possible to nest two invisible cavities, as the outer cavity would simply not notice the presence of the inner one, regardless of their relative position. As a result, the position of the inner cavity becomes a means to easily control the field localized inside the cavity and its quality factor. In this paper, we discuss the properties of nested invisible cavities as a simple method to achieve stronger localized fields and high tunable quality factor. Furthermore, we show that in optics, these cavities can be implemented using nanodisk-based dielectric metasurfaces that operate near their electric resonances.

Description

Funding Information: Research funding: This work was supported in part by the Academy of Finland ( https://doi.org/10.13039/501100002341 ) under grant 330260 and by Nokia Foundation ( https://doi.org/10.13039/501100004181 ) under scholarship 20200224. Publisher Copyright: © 2023 the author(s), published by De Gruyter, Berlin/Boston 2023.

Keywords

cavity, field localization, metasurface, quality factor, tunable

DOI

10.1515/nanoph-2022-0549

Citation

Cuesta , F S , Kosulnikov , S & Asadchy , V S 2023 , ' Tunable localization of light using nested invisible metasurface cavities ' , Nanophotonics , vol. 12 , no. 6 , pp. 1083-1089 . https://doi.org/10.1515/nanoph-2022-0549

Permanent link to this item

https://urn.fi/URN:NBN:fi:aalto-202303152427

Collections

[article-cris] Sähkötekniikan korkeakoulu / ELEC

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