A method includes forming a layer made of a first insulating material on a first layer made of a second insulating material that covers a support, defining a waveguide made of the first material in the layer of the first material, covering the waveguide made of the first material with a second layer of the second material, planarizing an upper surface of the second layer of the second material, and forming a single-crystal silicon layer over the second layer.

An optical logic gate decision-making circuit that combines non-linear materials, such as silicon nitride, on a silicon-on-insulator (SOI) substrate is described. Circuitry includes a ring cavity coupled to an input optical bus waveguide. The input optical bus waveguide receives an optical signal and passes the optical signal to the ring cavity. An electro-optical device, for instance a PN junction, is integrated within the ring cavity to modulate the optical signal such that an optical logic gate function is enabled. An output optical bus waveguide is also coupled to the ring cavity, which outputs the optical signal modified based on the optical logic gate function and based on a wavelength routing function. By using silicon nitride, the optical non-linearity of the materials enables an “all-optical” logic gate. Thus, the optical logic gate decision-making circuit is suitable for all-optical circuits, and support ultrafast optical signal processing and enabling packet switching of data.

A method includes forming a layer made of a first insulating material on a first layer made of a second insulating material that covers a support, defining a waveguide made of the first material in the layer of the first material, covering the waveguide made of the first material with a second layer of the second material, planarizing an upper surface of the second layer of the second material, and forming a single-crystal silicon layer over the second layer.

An optical device (10) includes an LCOS element (3), a heater substrate (2), and a resin layer (4) provided between the LCOS element (3) and the heater substrate (2), the resin layer (4) having a larger thickness at a central region of the LCOS element (3) than at a peripheral region of the LCOS element (3).

A backlight device including an optical sheet diffusing and outputting light from a light guide plate, a frame member having an opening corresponding to a light output surface of the light guide plate, the frame member being provided between the light guide plate and the optical sheet to secure a positional relationship therebetween. The device also includes a plurality of securing members provided at a peripheral edge of the frame member, which secure the optical sheet, are each coupled with the frame member via a thin hinge, and each include a pressing portion having a hole, where the pressing portion presses the optical sheet to the frame member. The frame member is provided with protrusions respectively fit into the holes. The optical sheet includes perforations, and the protrusions are inserted through the perforations and fit into the holes, and the pressing portions press the optical sheet to the frame member.

An optical device includes a plurality of optical waveguide units arranged in a first direction. Each of the optical waveguide units includes a first mirror having a first reflecting surface, a second mirror having a second reflecting surface facing the first reflecting surface, and at least one optical waveguide region located between the first mirror and the second mirror. The distance between the first reflecting surface and the second reflecting surface is different for each of the optical waveguide units.

There is provided a composite substrate in which peeling is significantly suppressed, light propagation loss is small when used as an electro-optical element, and high-speed and low-voltage drive is possible, and which can achieve an extremely thin electro-optical element capable of maintaining excellent reliability even under a severe high-temperature environment. A composite substrate for an electro-optical element according to an embodiment of the present invention includes: an electro-optical crystal substrate having an electro-optical effect; a first high dielectric layer; a second high dielectric layer; and a support substrate in the stated order. The first high dielectric layer and the second high dielectric layer are directly joined to each other, and an amorphous layer is formed at a joining interface between the first high dielectric layer and the second high dielectric layer.

A package comprises a photonic integrated circuit (PIC) with a modulator having a first modulator input, and a PIC interconnect region within two millimeters or fifty microns from the modulator. Additionally, an electric integrated circuit (EIC) is included with a driver circuit and an EIC interconnect region within two millimeters or fifty microns from the driver circuit. The driver circuit is electrically connected to the first modulator input via the EIC interconnect region, a first metal interconnect, and the PIC interconnect region. The modulator receives a temperature-dependent bias voltage, where the temperature dependence of the bias voltage inversely matches the temperature dependence of the modulator across an extended temperature range.

A liquid crystal-based non-mechanical beam steering device that permits steering in the mid-wave infrared and has a chalcogenide waveguide. The waveguide core, the subcladding, or both comprise a chalcogenide glass. The liquid crystal-based non-mechanical beam steering device has a tapered subcladding and a liquid crystal layer.

The invention relates generally to optically high transparency and adjustable haze, superomniphobic, rigid and flexible structures and, more particularly, to fused silica glass and flexible plastic, e.g., polymer, structures having a sub-wavelength texture formed on a surface thereof, which is effective to impart the optical properties of high transparency and adjustable haze to the structures. The texture is reentrant. Additionally, the optically high transparency and adjustable haze structures include a silicon dioxide coating applied to the texture and a treatment of a low surface energy material deposited on the silicon dioxide coating. The silicon dioxide coating renders the structures super hydrophilic, and the low surface energy material treatment renders the structures superomniphobic.