Conventional optical components rely on gradual phase shifts accumulated during light
propagation to shape light beams. New degrees of freedom are attained by introducing abrupt …

Conventional optical components such as lenses, waveplates and holograms rely on light
propagation over distances much larger than the wavelength to shape wavefronts. In this way …

Metamaterials are composed of periodic subwavelength metal/dielectric structures that
resonantly couple to the electric and/or magnetic components of the incident electromagnetic …

Experiments on ultrathin anisotropic arrays of subwavelength optical antennas display out-of-plane
refraction. A powerful three-dimensional (3D) extension of the recently demonstrated …

… Yu, Selection rules for quasibound states in the continuum, Phys. Rev. B … Yu, Dielectric
metasurfaces for complete and independent control of the optical amplitude and phase, Light …

Metasurfaces are optically thin metamaterials that promise complete control of the wavefront
of light but are primarily used to control only the phase of light. Here, we present an …

This paper reviews recent work on device applications of optical antennas. Localized surface
plasmon resonances of gold nanorod antennas resting on a silica glass substrate were …

Metasurfaces offer a unique platform to precisely control optical wavefronts and enable the
realization of flat lenses, or metalenses, which have the potential to substantially reduce the …

Solar cells are attractive candidates for clean and renewable power 1 , 2 ; with miniaturization,
they might also serve as integrated power sources for nanoelectronic systems. The use of …

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 …