10 results about "Transformation optics" patented technology

A semiconductor device includes a photonic die and an optical die. The photonic die includes a grating coupler and an optical device. The optical device is connected to the grating coupler to receive radiation of predetermined wavelength incident on the grating coupler. The optical die is disposed over the photonic die and includes a substrate with optical nanostructures. Positions and shapes of the optical nanostructures are such to perform an optical transformation on the incident radiation of predetermined wavelength when the incident radiation passes through an area of the substrate where the optical nanostructures are located. The optical nanostructures overlie the grating coupler so that the incident radiation of predetermined wavelength crosses the optical die where the optical nanostructures are located before reaching the grating coupler.

The embodiment of the application is suitable for the field of transformation optics, and provides an energy converging device, a parameter determination method and device of the energy converging device, a terminal device and a storage medium. The method comprises the following steps: determining a first structure parameter corresponding to a preset compression coefficient based on the compression coefficient; solving a preset nonlinear refractive index equation set according to a preset refractive index condition and the first structure parameter, and generating at least one candidate parameter set; taking a second candidate parameter with the minimum value in all candidate parameter sets as a third structure parameter of the energy converging device, and taking a first candidate parameter in the candidate parameter set corresponding to the second candidate parameter with the minimum value as a second structure parameter. The energy converging device manufactured according to the determined structure parameter can be directly used in air, so that the energy converging device has a wider use scenario.

The invention discloses a nonlinear lens based on a transformation material and a Kerr effect and a design method, and belongs to the field of optical signal processing and transformation materials. The nonlinear lens is a rectangular lens and is made of a nonlinear material. The spatial refractive index distribution is designed by changing the optical principle, the path instability in a dynamic system is combined with the optical Kerr effect, and the circular lens is adjusted into the square lens with the unstable system path by utilizing the spatial distribution of special material parameters; the weak refractive index change is converted into violent offset of a light beam output position under the instability characteristic of a dynamic system, and under the specific refractive index distribution, the lens has a focusing effect on the light beam propagating in the lens, so that the light beam is enhanced in a local area, and then the nonlinear effect is enhanced; and an optical system with higher speed and lower energy consumption is realized on a simpler device. According to the invention, conformal transformation is adopted, the isotropy of a lens material is ensured, and manufacturing of a nonlinear lens is facilitated.

This invention discloses an irregularly shaped resonant cavity based on transformation optics. An array of holes is formed on the substrate of a whispering-gallery resonant cavity. The spatial distribution of the array hole diameters satisfies the equation, and the refractive index distribution n(x,y) of the medium on the substrate satisfies the equation. This application uses transformation optics design methods to design an irregularly shaped resonant cavity, overcoming the limitations of traditional symmetrical cavity designs. This allows for an improvement in the Q-value of the resonant cavity through optimization of the cavity structure and material selection. Combining transformation optics optical field optimization technology and the high refractive index characteristics of lithium niobate material, edge scattering of light and material absorption loss are effectively reduced, further lowering the total loss of the resonant cavity. Utilizing the electro-optic effect of lithium niobate, dynamic tuning of the resonant cavity frequency is achieved through an external electric field, providing more flexible resonance characteristics.

This invention relates to a method and system for fabricating an ultra-small AWG chip, comprising: using ICP-VD technology on a silicon substrate to controllably grow a low-stress, low-optical-absorption silicon nitride thin film by adjusting plasma power and gas flow rate; covering the silicon nitride thin film with a hybrid mask, and determining a reactive ion etching combination with a primary etching gas and an auxiliary passivation gas according to a target volume ratio; etching the silicon nitride thin film based on the reactive ion etching combination to form a silicon nitride waveguide structure with a sidewall roughness less than a preset roughness threshold; adjusting the thickness and width of the waveguide to achieve a design goal of ultra-thin and ultra-wide waveguide compatible with single-mode transmission characteristics and low bending loss, and designing the bending transition section of the waveguide as a gradually curved structure by transforming optical principles; integrating the designed waveguide into the AWG chip in a preset array configuration, and using a Rowland circle overlapping lithography to compress the overlapping area between the input and output waveguides in the array.

The invention relates to a microminiature AWG chip manufacturing method and system, and the method comprises the steps: employing an ICPCVD technology on a silicon substrate, and carrying out the controllable growth of a low-stress and low-optical-absorption silicon nitride film through adjusting the plasma power and gas flow; covering the mixed mask on the silicon nitride film, and determining a reactive ion etching combination which takes a main etching gas as an auxiliary passivation gas according to a target volume ratio; the silicon nitride thin film is etched based on the reactive ion etching combination, and a silicon nitride waveguide structure with the side wall roughness smaller than a preset roughness threshold value is formed; the thickness and width of the waveguide are adjusted under the design target of the ultrathin and ultra-wide waveguide compatible with the single-mode transmission characteristic and the low bending loss, and the bending transition section of the waveguide is designed into a gradually-changed bending structure by changing the optical principle; and integrating the designed waveguides in an AWG chip according to a preset array form, and compressing an overlapping region between the input waveguide and the output waveguide in the array by adopting Rowland circle overlapping layout.

This invention proposes a rapid prediction method for the curing process of composite materials based on transformation optics. By introducing transformation optics theory and utilizing equivalent transformations of material parameters, the method maintains the stability of electromagnetic fields, temperature fields, and stress-strain fields when the thickness of the composite material in the simulation model is artificially increased. This reduces the spatial scale differences of components in the simulation model, decreases the number of meshes and computational complexity, and shortens the simulation time. While ensuring computational accuracy, it achieves rapid prediction of the composite material curing process (curing parameters).

The present invention discloses a fully polarized Fabry-Perot resonant material, belonging to the field of artificial media technology. The material comprises at least four sub-wavelength unit structures. The sub-wavelength units include a first plate-shaped sub-unit parallel to the x-axis-y-axis plane; a second sub-unit, a cross-shaped cylinder composed of two mutually perpendicular surfaces parallel to the x-axis-z-axis plane and the y-axis-z-axis plane, respectively. The two first sub-units are mirror-symmetrically arranged at either end of the cross of the second sub-unit. The transformation optical device of the present invention can achieve complete transmission of TM-polarized waves and TE-polarized waves of a specified operating frequency at any incident angle. The Fabry-Perot resonant material of the present invention has a simple structure, thin thickness, and light weight, and is perfectly compatible with free space. It can be widely used in fields such as electromagnetic compatibility and electromagnetic interference resistance, such as aircraft, radar, and various other military fields.

The present invention relates to the technical field of industrial product inspection, and specifically to an automatic optical detection angle change fixture and angle detection device, comprising a main body; a plurality of rotating bars for fixing workpieces, which are rotatably connected to the main body, and a plurality of magnets are provided on the rotating bars; a plurality of magnet bars are connected to the main body via plunger screws; a plurality of limit blocks are installed at the bottom of the main body and cooperate with the rotating bars; the magnet bottom of the rotating bar is trapezoidal or conical, and the limit blocks are provided with limit slots that cooperate with the rotating bar magnets, so that the magnets slide in the limit slots; by adjusting the position of the magnet bars, the magnet bars repel or attract the rotating bar magnets, and then drive the rotating bar magnets to rotate clockwise or counterclockwise. The function is stable, the action is simple and reliable, the efficiency of product angle change testing is high, and compared with the manual multiple placement test method, the production capacity is greatly improved and the cost is greatly reduced.

The application discloses an optical device based on a transformed material curved wave beam and an implementation method, and belongs to the technical field of transformed materials and optical signal processing technology.The optical device comprises an input surface, a two-dimensional straight-edge Eaton lens based on a transformed material curved wave beam and an output surface.The application adopts a transformed optical method to transform a traditional Eaton lens into a straight-edge lens, obtains a transformation relationship between the traditional Eaton lens through conformal transformation, and then obtains medium parameters by using a transformed material method.The incident angle and the exit angle of light on the transformed two-dimensional straight-edge Eaton lens remain unchanged, the light rays which are at the same angle with the normal line of each point of the input surface in the traditional Eaton lens are equivalent to parallel light rays after transformation, the incident angle of the light rays is equal to the exit angle, the propagation path of the wave beam is changed with the change of the incident angle, the wave beam path can reach a very wide curved angle, and variable-angle turning can be realized in a single device;the isotropy is ensured, and the preparation in engineering is facilitated.