Disclosed is a depth sensor for determining depth. The depth sensor can include a photosensor, a metalens configured to manipulate light to simultaneously produce at least two images having different focal distances on a surface of the photosensor, and processing circuitry configured to receive, from the photosensor, a measurement of the at least two images having different focal distances. The depth sensor can determine, according to the measurement, a depth associated with at least one feature in the at least two images.

A colored visibly opaque, highly efficient NIR-transmitting optical filter displaying angle insensitivity is based on one-dimensional photonic crystals. The filter comprises a photonic crystal stack comprising at least one high refractive index layer and two low refractive index layers respectively disposed along a first side and a second side of the high refractive index layer. The photonic crystal stack may have 10 or fewer layers. The filter transmits a first portion of an electromagnetic spectrum having a first range of predetermined wavelengths in an infrared light range or near infrared light range, while reflecting a second portion of the electromagnetic spectrum having a second range of predetermined wavelengths in a visible light range to generate a reflected output. In certain aspects, a refractive index contrast between the at least one high refractive index layer and at least one of the two low refractive index layers is ≥ about 40%.

A device for luminescent imaging includes an array of imaging pixels, a photonic structure over the array of imaging pixels, and an array of features over the photonic structure. A first feature of the array of features is over a first pixel of the array of imaging pixels, and a second feature of the array of features is over the first pixel and spatially displaced from the first feature. A first luminophore is within or over the first feature, and a second luminophore is within or over the second feature. The device includes a radiation source to generate first photons having a first characteristic at a first time, and generate second photons having a second characteristic at a second time. The first pixel selectively receives luminescence emitted by the first and second luminophores responsive to the first photons at the first time and second photons at the second time, respectively.

Provided is a meta optical device including a plurality of phase modulation regions respectively including a plurality of nanostructures and configured to modulate a phase of incident light, wherein a phase retardation profile of the plurality of phase modulation regions monotonically change with respect to light of a plurality of wavelength bands apart from each other, and wherein phase modulation ranges with respect to the light of the plurality of wavelength bands are different from each other.

A method to form a three-dimensional photonic crystal template with a gradient structure involves irradiating a photoresist composition of a thickness of at least 15 μm from at least four laser beams to yield a periodic patterned with a percolating matrix of mass in constructive volumes of a cured photoresist composition and destructive volumes of voids free of condensed matter where the proportion of constructive volume displays a gradient from the irradiated surface to the substrate after development. For a given light intensity, photoinitiator concentration in the photoresist composition, and a given thickness, by irradiating for a relatively short period, a three-dimensional photonic crystal template displaying a gradient having greater constructive volume proximal the air interface forms and a relatively long irradiation period results in a gradient having greater constructive volume proximal the substrate.

A meta-lens, an imaging optics, and an electronic device including the imaging optics are provided. The meta-lens includes at least one meta-layer having a plurality of nanostructures with a less shape dimension than an operating wavelength, modulates a phase and intensity of incident light, and forms a plurality of spots of different brightness on an imaging plane in an asymmetric distribution. The plurality of spots formed on the imaging plane include a main spot and at least one sub-spot that is separated from a center of the main spot and has lower illuminance than the main spot.

An optical device can comprise wires 12 on a face of a substrate 11, with channel(s) 13 between adjacent wires 12. Each wire 12 can include embedded organic moieties. Each wire 12 can include multiple ribs 31. Part or all of the wire 12, the substrate 11, or both can have a high refractive index n and a low extinction coefficient k. The optical device can have reduced separation of layers of different materials during flexing and temperature changes. The optical device can be manufactured by a method designed for improved manufacturability.

An optical system includes a plurality of laser light sources and an optical component. A first set of one or more laser light sources is configured to emit optical disinfection light at the optical component. A second set of one or more laser light sources is configured to emit optical communication light at the optical component. The optical component is configured to distribute the optical disinfection light in a first light distribution pattern, and to distribute the optical communication light in a second light distribution pattern. The optical component includes a first set of one or more metamaterial structures configured to distribute, in the first light distribution pattern, the optical disinfection light that is incident on the optical component, and a second set of one or more metamaterial structures configured to distribute, in the second light distribution pattern, the optical communication light that is incident on the optical component.

The invention relates to a method for creating a space of invisibility, which comprises: (a) providing a metamaterial plate having a subwavelength thickness, said metamaterial plate having bottom and top surfaces; (b) radiating the bottom surface of the metamaterial plate by a primary radiation thereby to form a space of invisibility above the top surface of the metamaterial plate, said space of invisibility being located within a space of a secondary radiation above the metamaterial plate which is in turn formed as a result of said primary radiation passing through metamaterial plate.

Disclosed are hydrophobic, acrylic materials having both high refractive index and a high Abbe number. The materials may have an internal wetting agent, are well suited for use as implantable ophthalmic devices, and have a refractive index which may be edited through application of energy. When used for an intraocular lens, the high refractive index allows for a thin lens which compresses to allow a small incision size.