@article {1308966, title = {Accelerating light with metasurfaces}, journal = {Optica}, volume = {5}, number = {6}, year = {2018}, pages = {678-681}, author = {M. Henstridge and C. Pfeiffer and D. Wang and A. Boltasseva and V. M. Shalaev and A. Grbic and R. Merlin} }