We have seen many publications on the topic of surface plasmon polaritons (SPP) in semiconductors. The patterns taken by the SPPs have invariably been static either in space, in time or in both. Experimentalists in The Netherlands recently used optical pumping to generate localized SPPs dynamically. This was achieved by inserting spatial light modulation (SLM) in the optical pump path. For the sake of clean, definitive experiments, the authors reported [arXiv:1309.7190] THz wave extinction by pseudo-randomly spaced dipoles of fixed lengths. In their conclusions, they point to exciting possible extensions (e.g., spatial and temporal control of resonant frequencies and local field enhancements).