A group of Harvard physicists have created a new type of lens, smaller and thinner than anything we've ever seen before. Rather than a curved piece of glass, this discovery is just 60 nanometers thick, and completely flat. In a paper published in Nano Letters, these lenses are explained. The researchers create them by taking an incredibly thin layer of silicon, and plating it with a nanometer-thick layer of gold. This gold is then stripped off, leaving behind tiny v-shaped structures. When light hits these structures, it's captured briefly, then released in a slightly different direction, mimicking a traditional lens.