%0 Journal Article %T Modulational instability of a recent nonlinear plasmonic metamaterial: Finite-difference-time-domain simulations %A Yi S. Ding %A Jiasen Zhang %A Ruo-Peng Wang %J Physics %D 2012 %I arXiv %X By doing time-domain simulations, we find the proposal for negative-to-positive index switching proposed in [Physical Review Letters, 106 105503 (2012)] may be fragile. The negative opinion on the uniform switching of local optical constants in our recent paper [arXiv:1111.1476v2] based on the circuit model of metamaterials can therefore be verified in this specific and realistic case. %U http://arxiv.org/abs/1204.5555v1