Ultrafast control of fractional orbital angular momentum of microlaser emissions

查看全文 作　　者：Zhifeng [1]Zhang;Haoqi [1]Zhao;Danilo Gomes [2]Pires;Xingdu [1]Qiao;Zihe [3]Gao;Josep [4]M.Jornet;Stefano [5,6]Longhi;Natalia [2]M.Litchinitser;Liang [1,3]Feng

机构地区：[1]Department of Electrical and Systems Engineering,University of Pennsylvania,Philadelphia,PA 19104,USA;[2]Department of Electrical and Computer Engineering,Duke University,Durham,NC 27708,USA;[3]Department of Materials Science and Engineering,University of Pennsylvania,Philadelphia,PA 19104,USA;[4]Department of Electrical and Computer Engineering,Northeastern University,Boston,MA 02115,USA;[5]Dipartimento di Fisica,Politecnico di Milano and Istituto di Fotonica e Nanotecnologie del Consiglio Nazionale delle Ricerche,Piazza L.da Vinci 32,I-20133 Milano,Italy;[6]Instituto de Fisica Interdisciplinar y Sistemas Complejos IFISC(CSIC-UIB),Palma de Mallorca,Spain

出　　处：《Light(Science & Applications)》索引2020年第9卷第1期,共9页

基　　金：the support from the National Science Foundation(NSF)(ECCS-1932803,OMA-1936276,ECCS-1842612,DMR-1809518,and CNS-2011411);U.S.Army Research Office(ARO)(W911NF-19-1-0249 and W911NF-18-1-0348);Office of Naval Research MURI(N00014-20-1-2558);partially supported by the NSF through the University of Pennsylvania Materials Research Science and Engineering Center(MRSEC)(DMR-1720530);supported by the NSF National Nanotechnology Coordinated Infrastructure Program under grant NNCI-1542153. 摘　　要：On-chip integrated laser sources of structured light carrying fractional orbital angular momentum(FOAM)are highly desirable for the forefront development of optical communication and quantum information-processing technologies.While integrated vortex beam generators have been previously demonstrated in different optical settings,ultrafast control and sweep of FOAM light with low-power control,suitable for high-speed optical communication and computing,remains challenging.Here we demonstrate fast control of the FOAM from a vortex semiconductor microlaser based on fast transient mixing of integer laser vorticities induced by a control pulse.A continuous FOAM sweep between charge 0 and charge+2 is demonstrated in a 100 ps time window,with the ultimate speed limit being established by the carrier recombination time in the gain medium.Our results provide a new route to generating vortex microlasers carrying FOAM that are switchable at GHz frequencies by an ultrafast control pulse. 关键词：MOMENTUM FRACTIONAL VORTEX

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Ultrafast control of fractional orbital angular momentum of microlaser emissions

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