Abstract:
Multi-wavelength light is directed to an optic including a substrate and achromatic metasurface optical components deposited on a surface of the substrate. The achromatic metasurface optical components comprise a pattern of dielectric resonators. The dielectric resonators have nonperiodic gap distances between adjacent dielectric resonators; and each dielectric resonator has a width, w, that is distinct from the width of other dielectric resonators. A plurality of wavelengths of interest selected from the wavelengths of the multi-wavelength light are deflected with the achromatic metasurface optical components at a shared angle or to or from a focal point at a shared focal length.
Abstract:
An optical device comprises a substrate and a metasurface. The metasurface comprises a plurality of nanoscale elements disposed on the transparent substrate at different orientations. The orientations of the nanoscale elements define a phase profile such that the nanoscale elements convert an incident light into an output light propagating substantially without diffraction.
Abstract:
A meta-lens having a phase profile includes a substrate and a plurality of nanostructures disposed on the substrate. Each individual nanostructure of the nanostructures imparts a light phase shift that varies depending on a location of the individual nanostructure on the substrate. The light phase shifts of the nanostructures define the phase profile of the meta-lens. The varying light phase shifts can be realized by, e.g., changing orientations of nanofins or changing diameters of nanopillars.
Abstract:
An optical device comprises a metasurface including a plurality of nanostructures. The nanostructures define a phase profile and a group delay profile at a design wavelength. The phase profile and the group delay profile determine and control the functionalities and the chromatic dispersion of the metasurface.
Abstract:
An optical device includes: (1) a substrate; and (2) multiple meta-lenses disposed on the substrate, each meta-lens of the meta-lenses including multiple nanofins disposed on a respective region of the substrate, the nanofins together specifying a phase profile of the meta-lens.
Abstract:
A meta-lens having a phase profile includes a substrate and a plurality of nanostructures disposed on the substrate. The nanostructures together define the phase profile of the meta-lens. The phase profile achieves an off-axis focus. Each nanostructure is designed according to at least one design parameter of the nanostructure that imparts a phase shift of light passing through the nanostructure.
Abstract:
An endoscopic imaging device (e.g., a catheter) comprises a light-transmitting tubing, at least one optical fiber disposed in the light-transmitting tubing, and at least one metalens. The metalens is optically coupled to the optical fiber and is configured to focus light from the optical fiber, through the light-transmitting tubing, and to a target point located outside of the light-transmitting tubing. The metalens includes a plurality of nanostructures. The nanostructures define a phase profile that corrects astigmatism caused by the light- transmitting tubing.
Abstract:
An optical imaging apparatus is disclosed. The optical imaging apparatus includes a metasurface lens including a substrate and a plurality of nano-structures patterned on a first side of the substrate. The optical imaging apparatus further includes imaging optics disposed in a spaced apart relationship with a second side of the substrate. The second side is opposite the first side on which the nano-structures are patterned. A surface of the imaging optics and the second side of the substrate define a space for accommodating an immersion fluid. The metasurface lens is configured to direct light incident on the plurality of nano-structures towards the imaging optics through the space accommodating the immersion fluid.
Abstract:
An optical device comprises a substrate and a metasurface. The metasurface comprises a plurality of nanoscale elements disposed on the transparent substrate at different orientations. The orientations of the nanoscale elements define a phase profile such that the nanoscale elements convert an incident light into an output light propagating substantially without diffraction.
Abstract:
A meta-lens having a phase profile includes a substrate and a plurality of nanostructures disposed on the substrate. The nanostructures together define the phase profile of the meta-lens. The phase profile achieves an off-axis focus. Each nanostructure is designed according to at least one design parameter of the nanostructure that imparts a phase shift of light passing through the nanostructure.