Fig. 1: Significance, principle and design of our work. | Nature Communications

Fig. 1: Significance, principle and design of our work.

From: Graphene/silicon heterojunction for reconfigurable phase-relevant activation function in coherent optical neural networks

Fig. 1

a General block diagram of photonic neural network integrated activation function devices, where different types of reported on-chip AF devices are compared. b Principle of choosing the AF with phase activation based on the fact that the coherent ONN is complex-valued and linear operation matrix is phase-sensitive. c Simplified flow-chart of our proposed complex-valued optical neural network. Det detector, Mod modulator, ONN optical neural network, AF activation function, Real real part, Imag imaginary part.

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