A photonic crystal, a light conversion device, a display panel, and a pair of glasses are provided. The photonic crystal of the embodiment of the present disclosure includes first dielectric layers and second dielectric layers having different refractive indexes, and the first dielectric layers and the second dielectric layers are alternately stacked. A thickness and a refractive index of each of the first dielectric layers and a thickness and a refractive index of each of the second dielectric layers are configured such that the photonic crystal blocks blue light with a wavelength of 420 nm to 470 nm incident into the photonic crystal from passing through the photonic crystal.

A liquid crystal display panel includes an array substrate, a color filter substrate, a plurality of pad structures disposed between the array substrate and the color filter substrate, a display area, and a light transmissive functional area. The pad structures are correspondingly disposed on the display area. The display area includes a predetermined area disposed at a periphery of the light transmissive functional area, and a thickness of each of the pad structures disposed on the predetermined area gradually decreases along a direction from the predetermined area to the light transmissive functional area.

An anti-dazzle imaging camera is provided that includes a photorefractive crystal that is wavelength-agnostic. The photorefractive crystal is configured to receive an optical beam. When the optical beam includes no laser, the photorefractive crystal is configured to pass the optical beam unchanged to an imaging detector. When the optical beam includes a laser, the photorefractive crystal is configured to attenuate the laser to generate a modified optical beam and to pass the modified optical beam to the imaging detector.

Methods and devices for manipulating optical signals. In one example, a LCOS (liquid crystal on silicon) device includes a surface bearing an anti-reflection structure. The anti-reflection structure includes i) a physical surface having a topography with features having lateral dimensions of less than 2000 nm and having an average refraction index which decreases with distance away from the surface; and ii) a configuration of the topography, averaged over lateral dimensions of greater than 2000 nm, varies with lateral position on the surface.

A photonic crystal, a light conversion device, a display panel, and a pair of glasses are provided. The photonic crystal of the embodiment of the present disclosure includes first dielectric layers and second dielectric layers having different refractive indexes, and the first dielectric layers and the second dielectric layers are alternately stacked. A thickness and a refractive index of each of the first dielectric layers and a thickness and a refractive index of each of the second dielectric layers are configured such that the photonic crystal blocks blue light with a wavelength of 420 nm to 470 nm incident into the photonic crystal from passing through the photonic crystal.

A liquid crystal display panel includes an array substrate, a color filter substrate, a plurality of pad structures disposed between the array substrate and the color filter substrate, a display area, and a light transmissive functional area. The pad structures are correspondingly disposed on the display area. The display area includes a predetermined area disposed at a periphery of the light transmissive functional area, and a thickness of each of the pad structures disposed on the predetermined area gradually decreases along a direction from the predetermined area to the light transmissive functional area.

An anti-dazzle imaging camera is provided that includes a photorefractive crystal that is wavelength-agnostic. The photorefractive crystal is configured to receive an optical beam. When the optical beam includes no laser, the photorefractive crystal is configured to pass the optical beam unchanged to an imaging detector. When the optical beam includes a laser, the photorefractive crystal is configured to attenuate the laser to generate a modified optical beam and to pass the modified optical beam to the imaging detector.

Microwave photonic devices use light to carry and process microwave signals over a photonic link. Light can be used as a stimulus to microwave devices that directly control microwave signals. Previous optically controlled devices suffer from large footprint, high optical power level required for switching, lack of scalability and complex integration requirements, restricting their implementation in practical microwave systems. Disclosed are monolithic optically reconfigurable integrated microwave switches (MORIMSs) built on a CMOS compatible silicon photonic chip. The disclosed scalable micrometer-scale switches provide higher switching efficiency and operate using optical power that is orders of magnitude lower than previous devices. The disclosed devices and techniques provide examples of silicon photonic platforms integrating microwave circuitry.

Methods and devices for manipulating optical signals. In one example, a LCOS (liquid crystal on silicon) device includes a surface bearing an anti-reflection structure. The anti-reflection structure includes i) a physical surface having a topography with features having lateral dimensions of less than 2000 nm and having an average refraction index which decreases with distance away from the surface; and ii) a configuration of the topography, averaged over lateral dimensions of greater than 2000 nm, varies with lateral position on the surface.

Microwave photonic devices use light to carry and process microwave signals over a photonic link. Light can be used as a stimulus to microwave devices that directly control microwave signals. Previous optically controlled devices suffer from large footprint, high optical power level required for switching, lack of scalability and complex integration requirements, restricting their implementation in practical microwave systems. Disclosed are monolithic optically reconfigurable integrated microwave switches (MORIMSs) built on a CMOS compatible silicon photonic chip. The disclosed scalable micrometer-scale switches provide higher switching efficiency and operate using optical power that is orders of magnitude lower than previous devices. The disclosed devices and techniques provide examples of silicon photonic platforms integrating microwave circuitry.