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

ABSTRACT: Optical neural networks (ONNs) herald a new era in information and communication technologies and have implemented various intelligent applications. In an ONN, the activation function (AF) is a crucial component determining the network performances and on-chip AF devices are still in development. Here, we first demonstrate on-chip reconfigurable AF devices with phase activation fulfilled by dual-functional graphene/silicon (Gra/Si) heterojunctions. With optical modulation and detection in one device, time delays are shorter, energy consumption is lower, reconfigurability is higher and the device footprint is smaller than other on-chip AF strategies. The experimental modulation voltage (power) of our Gra/Si heterojunction achieves as low as 1 V (0.5 mW), superior to many pure silicon counte

SUBMITTER: Zhong C 

PROVIDER: S-EPMC10618201 | biostudies-literature | 2023 Oct

REPOSITORIES: biostudies-literature