I think that there will be several advances in metamaterials that will have a positive impact on renewable energy. Metamaterials are close to being able to make things invisible to the naked eye after being successful for microwaves and t-waves. Studying how butterflies have such colorful wings has led to new ways to create video displays by using the structure to create color. When I was taking physics in high school, we were taught that light couldn’t have a negative refractive index, but now that is possible with metamaterials. The impacts of these changes haven’t fully been realized and I think will lead to cool new technologies.