Provided is an illumination device including a display panel including a first surface and a second surface that is opposite to the first surface, the display panel being configured to output light including image information through the first surface, a light source configured to emit light, the light source being spaced apart from the display panel in a direction away from and normal to the second surface of the display panel, a window panel including a first area configured to transmit the light output from the display panel and a second area configured to transmit the light emitted from the light source, and a light transmitting unit provided between the window panel and the light source, the light transmitting unit configured to transmit the light emitted from the light source to an object through the second area, the light transmitting unit including at least one meta-surface.

An active metasurface includes a number of periodically-repeated unit cells arranged on a substrate that each include a plasmonic waveguide shaped and sized to provide a cutoff mode that captures light of a target wavelength. The active metasurface includes an index modulation controller that controllably varies a voltage differential across each one of the periodically-repeated cells to change a phase of light incident on the metasurface.

A color filter array may include a plurality of color filters arranged two-dimensionally and configured to allow light of different wavelengths to pass therethrough. Each of the plurality of color filters includes at least one Mie resonance particle and a transparent dielectric surrounding the at least one Mie resonance particle.

To provide an optical glass having a high refractive index and a relatively low specific gravity, and an optical element.

An optical glass which is a SiO.sub.2—TiO.sub.2—Nb.sub.2O.sub.5-based glass, and in which the content of SiO.sub.2 is 10% by mass or greater, the total content of Na.sub.2O, K.sub.2O, and Cs.sub.2O(Na.sub.2O+K.sub.2O+Cs.sub.2O) is 11.0% by mass or less, and the specific gravity and the refractive index nd thereof satisfy formula (1).

nd≥0.2×specific gravity+1.18  (1):

To provide an optical glass having a high refractive index and a relatively low specific gravity, and an optical element.

An optical glass which is a SiO.sub.2—TiO.sub.2—Nb.sub.2O.sub.5-based glass, and in which the content of SiO.sub.2 is 10% by mass or greater, the total content of Na.sub.2O, K.sub.2O, and Cs.sub.2O(Na.sub.2O+K.sub.2O+Cs.sub.2O) is 11.0% by mass or less, and the specific gravity and the refractive index nd thereof satisfy formula (1).

nd≥0.2×specific gravity+1.18  (1):

A system and method are disclosed of electrostatic alignment and surface assembly of photonic crystals for dynamic color exhibition. The method includes aligning a plurality of photonic crystal chains in a solution to exhibit color.

A meta-lens includes a first layer that is arranged on a substrate and that includes a plurality of first nanostructures and a second layer including a plurality of second nanostructures separately arranged from the first nanostructures. The meta-lens may focus light of a plurality of wavelengths or light of a wide wavelength bandwidth due to the arrangement of the nanostructures in a multilayer structure.

Solid-state lighting devices including light-emitting diodes (LEDs), and more particularly integrated secondary optics into LED chip cover structures for improved optical emission of high intensity LEDs is disclosed. Optical elements are integrated as a secondary optic onto one or both surfaces of a chip cover structure, where the chip cover structure may be referred to as a primary optic. The integrated secondary optic may be formed directly on one or both surfaces of the chip cover structure. The integrated secondary optic is purposely built to be coupled with the light emission of the LED to emit a desired emission profile. In this regard, a final luminaire may be provided with increased efficiency either by improving the coupling of the LED into a conventional secondary optic or in some cases by removing the need for a conventional secondary optic all together.

Embodiments of the present disclosure generally relate to metasurface devices and methods of forming metasurfaces. The metasurface devices include a plurality of device structures. Each of the device structures are formed from multiple layers, at least one of which is an impedance matching layer. The impedance matching layer may be formed as either an inner impedance matching layer between the substrate and the device layer or as a separate outer impedance matching layer on top of the device layer. The refractive indices of the impedance matching layers are chosen to be between the refractive index of the mediums on either side of the impedance matching layer.

In various embodiments, a system comprising an atomic object confinement apparatus and one or more signal manipulation elements is provided. Each signal manipulation element (a) is associated with a respective atomic object position of the atomic object confinement apparatus and (b) is one of a collection array or an action array. A collection array is configured to, responsive to an emitted signal emitted by an atomic object at the respective atomic object position being incident on the collection array, provide an induced collection signal to a respective collection position. An action array is configured to, responsive to an incoming signal being incident on the action array, provide an induced action signal to the respective atomic object position. The one or more signal manipulation elements comprise metamaterial arrays and/or diffractive optical elements.