Patent ID: 11874497
Assignee: INSTITUTE OF SEMICONDUCTORS, CHINESE ACADEMY OF SCIENCES
Field: Optics (Instruments)
Classification: CPC G | IPC G

Claim 3:
4. The photonic chip according to claim 3, wherein the first buried silica layer, the second buried silica layer or the third buried silica layer is a single silica-layer with a refractive index greater than that of the first substrate, the second substrate or the third substrate; or
the first buried silica layer, the second buried silica layer or the third buried silica layer is a double silica-layer with a refractive index less than that of the first substrate, the second substrate or the third substrate, and a lower silica-layer in the double silica-layer has a refractive index less than that of an upper silica-laver in the double silica-layer.