Lens structure

A lens structure, comprising:

• a first substrate, located in a first layer;
• a second substrate, located in a second layer;
• a first adhesive material layer, located in the second layer and located above the second substrate, wherein the adhesive material layer located in a first region of the second layer is a surface relief structure;
• a first conductive layer, located in a second region of the first layer corresponding to a projected position of the first region, and located under the first substrate;
• a second conductive layer, located in the second layer and located above the first adhesive material layer;
• a first electrically controlled refractive index layer, located in a third region of a third layer corresponding to a projected position of the first region, wherein the third layer is beneath the first layer and above the second layer;
• and
• a conductive via, located in a fourth region of the third layer, for electrically connecting the second conductive layer and a third conductive layer located in a fifth region of the first layer corresponding to a projected position of the third region, wherein the third conductive layer is not electrically connected to the first conductive layer.