Symmetries play a fundamental role in engineering. In this talk, I will show how symmetry considerations can enable novel nanophotonics devices with advanced functionalities. Novel electromagnetic cavities that can hold light for an infinite amount of time will be introduced as well as the design of novel metamaterials built solely from symmetry considerations. I will present a realized closed ring negative index metamaterial and a self-assembled symmetry breaking metamaterials with controllable optical response.
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