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Isolation, switching and memory based on optomechanical metamaterials

We show that cavity optomechanics can provide a rich platform to obtain a range of electromagnetic properties and functionalities that are otherwise unachievable in standard materials and structures. In particular, we explore the potential and challenges of optomechanical non-reciprocity based on a classical analysis, and introduce a new class of on-chip optical isolators and circulators. In addition, we show how the bistability of coupled optomechanical cavities can be utilized for all-optical switching and memory applications.