Abstract

We propose a transmission line working at telecom wavelengths with a cross section as small as ${\lambda ^2}/39$, which is 1.6 times smaller than that of an optimized silicon waveguide. The proposed line can be implemented as a subwavelength fiber with plasmonic cladding. This considerable decrease in the line cross section is achieved by utilizing a plasmonic quasi-antisymmetric mode. The required plasmonic cladding is rather thin; therefore, losses are moderate and could be compensated by using amplifying core materials. Such a transmission line can find applications in densely integrated optical systems.

© 2020 Optical Society of America

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Supplementary Material (1)

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» Supplement 1       In this Supplemental Document, the full set of the equations for the field components in the core, cladding, and outer medium is provided.

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Equations (8)

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