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. 2016 Dec 19;6:39317. doi: 10.1038/srep39317

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Copyright © 2016, The Author(s)

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(a) Potential realization of a fully functional integrated artificial neural motif, similar to Fig. 1c. A passive/active integration technique can be used in order to allow the combination of III-V (quantum dot lasers) and IV materials (waveguides, filters, isolators). The terms GSF and ESF correspond to ground-state filter and excited-state filter respectively. (b) An alternative neuron design that enables neuron reconfiguration to achieve either excitatory or inhibitory operation with a simple adjustment of the bias at the saturable absorber and at the variable optical attenuator (VOA). ISO stands for integrated optical isolator.