Reconfigurable optical neural network based on phase change material and application thereof

The invention discloses a reconfigurable optical neural network based on a phase change material and application thereof, and belongs to the field of optical neural networks, and the reconfigurable optical neural network comprises an optical information input layer, a reconfigurable diffraction layer and a detection output layer. The reconfigurable diffraction layer comprises n optical diffraction plates which are parallel to one another and are arranged at intervals, and is used for regulating and controlling the intensity distribution of incident light to obtain plane light to be measured; the optical diffraction plate comprises a substrate, a phase-change material layer and a protective layer which are sequentially arranged, the phase-change material layer and the protective layer are divided into a plurality of independent areas to form a plurality of units, and phase-change materials in the units can be switched among a plurality of states including a crystalline state and an amorphous state; the optical