Abstract: A metasurface optical device includes a substrate, a film layer, and a metasurface structural unit array. The substrate includes a first surface and a second surface opposite to each other in a thickness direction of the substrate. The film layer is formed on the first surface of the substrate and includes at least one film group of films distributed at different positions on the first surface. Each film group includes one film, or a plurality of films stacked one over another in the thickness direction of the substrate. Each of the plurality of films includes a material with a corresponding refractive index to enhance transmission and/or reflection of light. The metasurface structural unit array includes a plurality of metasurface structural units formed on a side of the first film layer away from the substrate and extending in a direction away from the substrate.

Abstract: A metasurface spatial spectrometer includes a beam splitter, a first reflector, a second reflector, and a reception sensor. A reflective surface of the first reflector or the second reflector includes a plurality of sub-wavelength structures with different functions and arranged according to preset positions. The beam splitter is configured to: transmit a first portion of incident light and reflect a second portion of the incident light, transmit a portion of light reflected by the first reflector, and reflect a portion of light reflected by the second reflector. The first reflector is arranged at an angle of 45°, ?45°, 135°, or ?135° with respect to the beam splitter, and is configured to reflect the second portion of the incident light. The second reflector is arranged perpendicular to the first reflector, and is configured to reflect the first portion of the incident light.

Abstract: An optical assembly includes a first substrate and a second substrate that extend parallel to a reference plane and are separated from each other in a direction perpendicular to the reference plane; and a plurality of optical elements that are arranged parallel to the reference plane and include a first metasurface element and a second metasurface element. The first metasurface element is embedded in the first substrate and/or the second metasurface element is embedded in the second substrate. The first metasurface element and the second metasurface element are configured such that one of the first metasurface element and the second metasurface element reflects at least a portion of light to another one of the first metasurface element and the second metasurface element.

Abstract: A metasurface device includes a plurality of metasurface units and a flexible connection structure. The plurality of metasurface units are arranged in a plane shape spaced apart from each other. Each metasurface unit of the plurality of metasurface units includes a substrate and a plurality of nanostructure units arranged on a side of the substrate. The flexible connection structure connects the plurality of metasurface units.

Abstract: An optical modulation device includes a waveguide, a first electrode layer, and a second electrode layer. The waveguide layer includes a waveguide body and a plurality of nano-waveguides embedded in the waveguide body and extending in an extension direction. The first electrode layer is arranged on one side of the waveguide layer and includes a plurality of first electrodes extending along the extension direction and arranged in a one-to-one correspondence with the plurality of nano-waveguides. The second electrode layer is arranged on a side of the waveguide layer facing away from the first electrode layer and includes a plurality of second electrodes extending in the extension direction and arranged in a one-to-one correspondence with the plurality of first electrodes.

Abstract: A laser device includes a laser device body and a light-emission assembly. The light-emission assembly is arranged at one end of the laser device body and includes an optical processing assembly. The optical processing assembly includes a first reflection layer, a gain medium layer, and a second reflection layer arranged in sequence. At least two metasurface devices are arranged in at least one of the first reflection layer and the second reflection layer. The at least two metasurface devices are configured to reflect or refract to-be-emitted light to cause the to-be-emitted light to be transmitted and modulated through the gain medium layer.

Abstract: A symmetrical metasurface optical device includes a substrate and a plurality of nanopillars symmetrically arranged at a surface of the substrate. The plurality of nanopillars have different optical properties. When a center of symmetry of the plurality of nanopillars coincides with a center of the substrate, nanopillars of a same optical property among the plurality of nanopillars are distributed non-uniformly and symmetrically. Or when the nanopillars of the same optical property among the plurality of nanopillars are distributed uniformly and symmetrically, the center of symmetry of the plurality of nanopillars does not coincide with the center of the substrate.

Abstract: A photosensitive assembly includes a photosensitive element including a plurality of pixels arranged in an array, the plurality of pixels including two groups of pixels configured to respectively sense incident light of different properties; a filter element including at least one of a color filter including a plurality of color filter units arranged in one-to-one correspondence with the plurality of pixels, the plurality of color filter units including two groups of color filter units corresponding to the two groups of pixels, respectively, and each of the two groups of color filter units having a light-passing wavelength band corresponding to a wavelength band sensed by a corresponding one of the two groups of pixels, a polarization filter, or an aperture; and a metasurface light-guiding element configured to guide the incident light of different properties to respective ones of the two groups of pixels.

Abstract: A spectrometer includes a collimator, a grating array, a metasurface, and a photodetector. The collimator is configured to collimate light including a plurality of portions with different wavelengths. The grating array is configured to guide, disperse, and deflect the light from the collimator. The metasurface array is configured to guide and focus the light from the grating array. The plurality of portions of the light with different wavelengths are focused by the metasurface array to different positions on a detection plane. The photodetector is configured to receive the light from the metasurface array at the detection plane.

Abstract: A multi-function metasurface beam splitter includes at least two metalens arrays. Any metalens array of the at least two metalens arrays includes at least one metalens unit, and the at least two metalens arrays include a metalens unit set. The metalens unit set includes at least two metalens units with two different light processing functions, and a combination relationship among each metalens unit in the metalens unit set satisfies a first preset condition for realizing a preset function. The preset function refers to a light processing function of the multi-function metasurface beam splitter. A combination relationship among the at least two metalens arrays satisfies a second preset condition for realizing the preset function.

Abstract: A fiber grating apparatus includes a first optical fiber, an optical wave assembly coupled to the first optical fiber and having grating function, and a second optical fiber coupled to the optical wave assembly. The optical wave assembly includes a first substrate, a metalens assembly, a filter, and a second substrate. The first optical fiber, the optical wave assembly, and the second optical fiber are arranged on a same plane.

Abstract: A metasurface optical device includes a substrate and a plurality of nano-pillars disposed at an end surface of the substrate. The plurality of nano-pillars is made of at least two kinds of materials, and dispersion coefficients of the at least two kinds of materials compensate or cancel each other or are configured to realize a pre-determined function.

Abstract: A zooming control device includes a filter assembly, a metalens device spaced apart from the filter assembly, and a polarization selection device between the filter assembly and the metalens device. The filter assembly is configured to select a wavelength of light exiting the filter assembly and includes an optical device having an adjustable refractive index that varies with an electric current applied to the optical device. The polarization selection device is configured to select a polarization state of the light exiting the filter assembly and passing through the polarization selection device.

Abstract: A metasurface optical device includes a substrate, a nano-structure layer, and a chromatic aberration adjustment layer. The nano-structure layer is formed on a side of the substrate and includes a plurality of nano-structure units. The chromatic aberration adjustment layer includes a stepped structure. The material of the chromatic aberration adjustment layer is different from the substrate material.

Abstract: A metasurface optical device includes a substrate and a nano-structure layer. The nano-structure layer is arranged on the substrate and includes a plurality of photonic crystal units. Each photonic crystal unit includes a plurality of nano-structure units arranged on the substrate such that an energy bandgap is formed in a cross-section of the photonic crystal unit parallel to the substrate. The energy bandgap surrounds the center area of the cross-section.

Abstract: A metasurface optical device includes a substrate and a nano-structure layer disposed on the substrate. The nano-structure layer includes a plurality of nano-structure units. The plurality of nano-structure units extend in a direction away from the substrate, and central axes of the plurality of nano-structure units form corresponding angles with respect to a normal direction of the substrate, such that the plurality of nano-structure units are arranged obliquely relative to the substrate.

Abstract: A metasurface optical device includes a substrate and a nano-structure layer disposed on the substrate. The nano-structure layer includes a plurality of composite nano units each including a plurality of nano-structure units arranged on the substrate. Arrangement periods of the plurality of composite nano units are not completely same, and arrangement periods of the plurality of nano-structure units in one composite nano unit of the plurality of composite nano units are not completely same.