@inproceedings{21635,
  abstract     = {We report high numerical aperture meta-lenses in the visible spectrum with focal spots as small as 0.65λ. Meta-lenses are based on ultra-thin titanium dioxide metasurface phase masks. They operate in transmission mode and are polarization-insensitive.},
  author       = {Khorasaninejad, M. and Chen, W. T. and Zhu, A. and Oh, J. and Roques-Carmes, Charles and Mishra, I. and Devlin, R. C. and Capasso, F.},
  booktitle    = {Frontiers in Optics 2016},
  location     = {Rochester, NY, United States},
  publisher    = {Optica Publishing Group},
  title        = {{High numerical aperture meta-lenses at visible wavelengths}},
  doi          = {10.1364/fio.2016.jw4a.63},
  year         = {2016},
}