A dielectric grating integrated infrared narrow-band detector and spectral detection chip
Through the infrared narrowband detector integrated with dielectric grating, incident light is coupled into the waveguide layer, solving the problem of low light absorption of ultra-thin detection materials and achieving efficient narrowband detection and multi-band detection capabilities.
Patent Information
- Application Number
- CN202210924012.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2022-08-02
- Publication Date
- 2025-03-18
- Estimated Expiration
- 2042-08-02
AI Technical Summary
While the existing infrared detectors reduce the device size, the light absorption rate of the material has significantly decreased and cannot effectively respond to incident light. Especially for two-dimensional materials, their application is limited by extremely low light absorption.
Through the dielectric grating integrated structure, incident light is coupled into the waveguide layer with a high refractive index, increasing the interaction distance between the detection material and light, thereby improving the light absorption rate. The structure includes a substrate layer, a waveguide layer, a detection material layer and a grating layer. The grating layer allows the incident light to satisfy the waveguide coupling conditions through diffraction.
Narrowband detection of incident light of specified bands is achieved, while significantly improving the absorption efficiency of ultra-thin detection materials on incident light, with an absorption rate of more than 40%, and the ability to detect multiple bands simultaneously and output the response spectrum.