Orbital angular momentum mode logical operation using optical diffractive neural network  

作　　者：PEIPEI WANG WENJIE XIONG ZEBIN HUANG YANLIANG HE ZHIQIANG XIE JUNMIN LIU HUAPENG YE YING LI DIANYUAN FAN SHUQING CHEN 

机构地区：[1]International Collaborative Laboratory of 2D Materials for Optoelectronics Science and Technology,Institute of Microscale Optoelectronics,Shenzhen University,Shenzhen 518060,China [2]College of New Materials and New Energies,Shenzhen Technology University,Shenzhen 518118,China [3]Guangdong Provincial Key Laboratory of Optical Information Materials and Technology and Institute of Electronic Paper Displays,South China Academy of Advanced Optoelectronics,South China Normal University,Guangzhou 510006,China

出　　处：《Photonics Research》2021年第10期2116-2124,共9页光子学研究（英文版）

基　　金：National Natural Science Foundation of China(12047539,61805149,62101334);Guangdong Basic and Applied Basic Research Foundation(2019A1515111153,2020A1515011392,2020A1515110572,2021A1515011762);Shenzhen Fundamental Research Program(JCYJ20180507182035270,JCYJ20200109144001800);Science and Technology Project of Shenzhen(GJHZ20180928160407303);Shenzhen Universities Stabilization Support Program(SZWD2021013);Shenzhen Excellent Scientific and Technological Innovative Talent Training Program(RCBS20200714114818094);China Postdoctoral Science Foundation(2020M682867)。

摘　　要：Optical logical operations demonstrate the key role of optical digital computing,which can perform general-purpose calculations and possess fast processing speed,low crosstalk,and high throughput.The logic states usually refer to linear momentums that are distinguished by intensity distributions,which blur the discrimination boundary and limit its sustainable applications.Here,we introduce orbital angular momentum(OAM)mode logical operations performed by optical diffractive neural networks(ODNNs).Using the OAM mode as a logic state not only can improve the parallel processing ability but also enhance the logic distinction and robustness of logical gates owing to the mode infinity and orthogonality.ODNN combining scalar diffraction theory and deep learning technology is designed to independently manipulate the mode and spatial position of multiple OAM modes,which allows for complex multilight modulation functions to respond to logic inputs.We show that few-layer ODNNs successfully implement the logical operations of AND,OR,NOT,NAND,and NOR in simulations.The logic units of XNOR and XOR are obtained by cascading the basic logical gates of AND,OR,and NOT,which can further constitute logical half-adder gates.Our demonstrations may provide a new avenue for optical logical operations and are expected to promote the practical application of optical digital computing.

关 键 词：NETWORK MODE MOMENTUM 

分 类 号：O43[机械工程—光学工程] TP183[理学—光学]