Romain Blanchard

TL;DR: The concept of optical phase discontinuities is applied to the design and demonstration of aberration-free planar lenses and axicons, comprising a phased array of ultrathin subwavelength-spaced optical antennas.

TL;DR: In this paper, the concept of optical phase discontinuities is applied to the design and demonstration of aberration-free planar lenses and axicons, comprising a phased array of ultrathin subwavelength spaced optical antennas.

TL;DR: It is shown that under appropriate conditions interference can instead persist in ultrathin, highly absorbing films of a few to tens of nanometres in thickness, and a new type of optical coating comprising such a film on a metallic substrate, which selectively absorbs various frequency ranges of the incident light is demonstrated.

TL;DR: In this paper, the authors show that perfect absorption can be achieved in a system comprising a single lossy dielectric layer of thickness much smaller than the incident wavelength on an opaque substrate by utilizing the nontrivial phase shifts at interfaces between lossy media.

TL;DR: In this paper, a flat optical device that generates optical vortices with a variety of topological charges is demonstrated, which spatially modulates light beams over a distance much smaller than the wavelength in the direction of propagation by means of an array of V-shaped plasmonic antennas with subwavelength separation.