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.

An electronic device includes an image sensor, a light transmission module including light transmission elements, a light reception module including light reception elements, and a processor operatively connected with the image sensor, the light transmission module, and the light reception module. The processor obtains first distance information through the light transmission elements and the light reception elements, obtains a first frame and a second frame through the image sensor, obtains area information related to an area of the second frame, in which a difference in pixel value from the first frame is a set value or more, through the image sensor, activates a light transmission element corresponding to the area among the light transmission elements based on the area information, and obtains second distance information about the area through the activated light transmission element and at least one of the light reception elements.

A combination structure includes an in-plane pattern of unit cells, wherein the each unit cell includes nanostructures each having a dimension that is smaller than a near-infrared wavelength and a light-absorbing layer adjacent to the nanostructures and including a near-infrared absorbing material configured to absorb light in at least a portion of a near-infrared wavelength spectrum. The nanostructures are define a nanostructure array in the unit cells, and a wavelength width at 50% transmittance of a transmission spectrum in the near-infrared wavelength spectrum of the combination structure is wider than a wavelength width at 50% transmittance of a transmission spectrum in the near-infrared wavelength spectrum of the nanostructure array.

A method of manufacturing an optical element is disclosed. The method comprises the steps of forming a layer of first material on a substrate, forming a plurality of cavities in the layer of first material by an imprinting process, and forming a layer of second material in the plurality of cavities to form an optical meta-surface. Also disclosed is an optical element manufactured according to the method, and an optical device comprising the optical element, and an optical apparatus such as a cellular telephone, a camera, an image-recording device, or a video recording device.

Used is a display device having: a support; first and second image light source units mounted on the support; a first half mirror mounted on the support and having a first reflecting surface inclined with respect to an emitting direction of light of the first image light source unit; and a second half mirror mounted on the support and having a second reflecting surface inclined with respect to an emitting direction of light of the second image light source unit. The light emitted from the first image light source unit is reflected by the first reflecting surface and irradiated in a first direction, and the light emitted from the second image light source unit is reflected by the second reflecting surface and irradiated in a second direction different from the first direction. The same image or a different image can be simultaneously displayed at the first and second display regions.

Provided is a meta-optical device including a meta-lens including a plurality of nano-structures, a band pass filter configured to transmit light of predetermined wavelengths within an operation wavelength band of the meta-lens, and a spacer layer provided between the meta-lens and the band pass filter to support the plurality of nano-structures and to form a separation distance between the meta-lens and the band pass filter.

A meta-optical device for collimating and deflecting a light beam is provided to include a substrate assembly and at least one meta-optical array that is formed on the substrate assembly and that is disposed to receive at least one light beam. The at least one meta-optical array includes a plurality of nanostructures that are made in such a way that the at least one light beam is collimated and deflected after passing through the at least one meta-optical array.

Methods of manufacturing an optical device can include, in some implementations, providing a substrate having a first polymeric layer on a surface of the substrate and a second polymeric layer on the first polymeric layer, forming first openings in the second polymeric layer to define an etch mask composed of material of the second polymeric layer, and etching to form second openings in the first polymeric layer, wherein locations of the second openings are defined by the etch mask. A material is deposited in the second openings to form meta-atoms of a first metastructure, wherein adjacent ones of the meta-atoms are separated from one another by polymeric material of the first polymeric layer. Optical devices including metastructures can be formed, where meta-atoms of the metastructure have a relatively high aspect ratio.

Optical films and stacks include at least one optically diffusive layer. The optically diffusive layer can include a plurality of nanoparticles and a polymeric material bonding the nanoparticles to each other to form a plurality of nanoparticle aggregates defining a plurality of voids therebetween. For substantially normally incident light and a visible wavelength range from about 450 nm to about 650 nm and an infrared wavelength range from about 930 nm to about 970 nm: in the visible wavelength range, the optical film or optically diffusive layer has an average specular transmittance Vs; and in the infrared wavelength range, the optical film or optically diffusive layer has an average total transmittance It and an average specular transmittance Is, Is/It≥0.6, Is/Vs≥2.5.

A thin-film optical device disclosed herein includes a metalens able to modulate the phase of incident light. The metalens includes a thin-film layer having a first index of refraction, an embedded layer within the thin-film layer, and the embedded layer having a second index of refraction greater than or equal to 1.5 and less than or equal to 3.0 times the first index of refraction. The embedded layer may fill a plurality of holes formed on the thin film layer, with the depth, width, and spacing of holes all contribute to modulating the phase of light traveling through the metalens.