Optical technology has proved to be the best choice for the transmission of information at high data rate over long distances. However, the implementation of high-speed, low-energy, all-optical logics in semiconductors represents a formidable challenge due to the intrinsic difficulty of all-optical devices to satisfy the basic system requirements . In particular, cascadability is difficult to obtain in optical systems, and it is assured only if the output of one stage is in the correct form to drive the input of the next stage. In this context, we demonstrate a scheme of all-optical transistor based on exciton polaritons in semiconductor microcavities, which exhibits full connectivity in the same chip plane.
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