Fig. 4: Photos of the chip.
From: Using light to image millimeter wave based on stacked meta-MEMS chip

a The fabricated stacked meta-MEMS array chip; b A photo of the chip; c A micrograph of 3 × 3 pixels array area; d A micrograph of one pixel
From: Using light to image millimeter wave based on stacked meta-MEMS chip

a The fabricated stacked meta-MEMS array chip; b A photo of the chip; c A micrograph of 3 × 3 pixels array area; d A micrograph of one pixel