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Extraordinary high- and low-momentum lossless plasmonic modes in one-dimensional metamaterials

A. Goncharenko,Yia-Chung Chang,R. Knize,A. Pinchuk

Published 2017 in Optical Materials Express

ABSTRACT

The implementation of lossless plasmonic modes with very high or very low wave vectors, which are associated with extraordinary large or small nonlocal effective permittivity, could bring a breakthrough in the development of high-performance plasmonic devices. We consider the possibility of obtaining volume plasmon-polariton modes with an extraordinary large or negligibly small longitudinal momentum and nearly zero loss in a 1d lattice consisting of alternating metal and gain semiconductor layers. Solving the dispersion equation, we show that under the condition of the full loss compensation, two traveling plasmonic TM modes can exist in the lattice. One of the modes is capable to provide extraordinary high momentum value, while the other can provide both extraordinary high and low (nearly zero) momentum. On the other hand, only one traveling TE mode can occur, which is capable of providing extraordinary low momentum. The use of such modes opens up new ways to design optical properties and to control light on the nanometer scale.

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