All-optical nonlinear activation functions realized on phasechange photonic integrated circuits with microheaters  

作　　者：Jiyuan Jiang Bingxin Ding Shiyu Li Xin Zhang Haihua Wang Jie Wu Xiaoyan Liu Zhou Wang Xiaojuan Lian Wen Huang Lei Wang 

机构地区：[1]School of Integrated Circuit Science and Engineering,Nanjing University of Posts and Telecommunications,Nanjing 210023,China [2]School of Science,Nanjing University of Posts and Telecommunications,Nanjing 210023,China [3]The State Key Laboratory of Silicon and Advanced Semiconductor for Materials,Zhejiang University,Hangzhou 310027,China [4]Nantong Institute of Nanjing University of Posts and Telecommunications,Nantong 226021,China

出　　处：《Journal of Semiconductors》2025年第2期122-131,共10页半导体学报(英文版)

基　　金：supported by the National Natural Science Foundation of China(Grant Nos.62104114,62404111);Natural Science Foundation of Jiangsu Province(Grant Nos.BK20240635,BZ2021031);Opening Project of Advanced Integrated Circuit Package and Testing Research Center of Jiangsu Province(Grant No.NTIKFJJ202303);Natural Science Foundation of the Jiangsu Higher Education Institutions of China(Grant No.24KJB510025);Natural Science Research Start-up Foundation of Recruiting Talents of Nanjing University of Posts and Telecommunications(Grant Nos.NY223157,NY223156);Natural Science Foundation of Nanjing University of Posts and Telecommunications(Grant No.NY224140);Project funded by China Postdoctoral Science Foundation(Grant No.2023M732916).

摘　　要：Photonic neural networks have garnered significant attention in recent years due to their ultra-high computational speed,broad bandwidth,and parallel processing capabilities.However,compared to conventional electronic nonlinear activa-tion function(NAF),progress on efficient and easily implementable optical nonlinear activation function(ONAF)was barely reported.To address this issue,we proposed a programmable,low-loss ONAF device based on a silicon micro-ring resonator capped with the Antimony selenide(Sb_(2)Se_(3))thin films,and with indium tin oxide(ITO)used as the microheater.Leveraging our self-developed phase-transformation kinetic and optical models,we successfully simulated the phase-transition behavior of Sb_(2)Se_(3)and three different ONAFs—ELU,ReLU,and radial basis function(RBF)were achieved according to discernible optical responses of proposed devices under different phase-change extents.Classification results from the Fashion MNIST dataset demonstrated that these ONAFs can be considered as appropriate substitutes for traditional NAF.This indicated the bright prospect of the proposed device for nonlinear activation function in future photonic neural networks.

关 键 词：ONAF Sb_(2)Se_(3) MICROHEATER photonic neural networks 

分 类 号：TN491[电子电信—微电子学与固体电子学]