Figure 1 | Vision of the project NEHO: Neuromorphic computing Enabled by Heavily doped semiconductor Optics. (IMAGE)
Caption
Figure 1 | Vision of the project NEHO: Neuromorphic computing Enabled by Heavily doped semiconductor Optics. On the left panel a ring resonator evanescently couples to two ridge waveguides (blue layers): the two propagating modes in the ridge waveguides interact through the ring resonator, where the nonlinearity makes the degree of interaction dependent on the input intensity of the propagating modes (signal strength). This typical photonic integrated chip structure can be adapted to the NEHO concept of a reconfigurable optical nonlinearity based on free carrier hydrodynamics in a thin semiconductor layer that we demonstrate in this work. In the future, the free carrier density could be further tuned by a field effect gate (yellow layer) making the nonlinear coefficient reconfigurable at will, as required by modern neuromorphic computing approaches (right panel).
Credit
Andrea Rossetti, Huatian Hu et al.
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CC BY