Spatial Light Modulator Structure for LiDAR Thermal Crosstalk

The patent introduces a filling layer as an intermediary substance between adjacent grating structures. This filling layer, having different thermal and optical properties than the grating structures themselves, acts as a mediator that reduces thermal crosstalk while allowing the grating structures to remain in close proximity for efficient light steering. The filling layer transmits light effectively but impedes heat transfer between neighboring structures.

The patent applies the principle of local quality by selecting a filling layer material with specific local properties that differ from both the grating structures and the desired thermal management characteristics. The filling layer is engineered to have optical transparency matching the operating wavelength while possessing thermal properties that reduce heat transfer. This localized material selection allows different regions of the device to serve different functions: grating structures for light modulation, filling layer for thermal isolation and light transmission.

The filling layer serves as a space-efficient intermediary that enables thermal isolation without requiring increased physical spacing. By placing this specialized layer directly between adjacent grating structures, the patent achieves thermal crosstalk reduction while maintaining compact device dimensions. The filling layer's thin profile allows it to fit within the existing device footprint while providing effective thermal barrier functionality.