@article{hwang2011plasmonic,
title={Plasmonic stop band formation in a metal--insulator--metal ring with a narrow gap},
author={Hwang, Yongsop and Kim, Jae-Eun and Park, Hae Yong and Kee, Chul-Sik},
journal={Journal of Optics},
volume={13},
number={7},
pages={075006},
year={2011},
publisher={IOP Publishing}
}