2results about How to "Reduce optical crosstalk" patented technology

The application relates to the technical field of image sensors, and provides an image sensor and a manufacturing method.The image sensor comprises a semiconductor substrate, a plurality of pixel regions, a metal interconnection layer and a blocking structure.The blocking structure is composed of an isolation structure arranged in the semiconductor substrate, a crosstalk modulation structure and a first contact hole structure which are sequentially arranged in a dielectric layer and correspond to the isolation structure.The blocking structure can form an effective light blocking wall structure on one hand, preventing light of one pixel region from being reflected by the metal interconnection layer and crosstalking into an adjacent pixel region; and on the other hand, the blocking structure can prevent over-etching of the isolation structure during processing of the first contact hole structure, thereby reducing the enrichment and diffusion of charges in the isolation structure, effectively improving the dark current performance of the device, and simultaneously reducing optical crosstalk and electrical crosstalk of the image sensor, which is conducive to improving the imaging quality of the image sensor.

The application provides an electro-optical modulator and an optical quantum computer, and relates to the technical field of electro-optical modulation.The electro-optical modulator comprises a waveguide optical path structure, a direct current bias structure and a radio frequency modulation structure.The waveguide optical path structure comprises an input end optical waveguide, a light splitting waveguide, a first modulation arm, a second modulation arm, a beam combining waveguide, a curved waveguide and an output end optical waveguide connected in sequence.The output end optical waveguide is arranged side by side with the input end optical waveguide and is connected with the curved waveguide.The direct current bias structure is arranged on the two sides of the first modulation arm.The radio frequency modulation structure is arranged on the two sides of the first modulation arm and the two sides of the plurality of second modulation arms.The light signal directions of the input end optical waveguide and the output end optical waveguide are opposite.Compared with the prior art, the application can realize the same side coupling of the input and output optical ports, the overall size is smaller, the degree of integration is higher, the light directly entering the light outlet port is avoided, the optical crosstalk is reduced, the extinction ratio is improved, and the optical signal transmission effect is improved.