Exploring van der Waals materials with high anisotropy:geometrical and optical approaches  

作　　者：Aleksandr S.Slavich Georgy A.Ermolaev Mikhail K.Tatmyshevskiy Adilet N.Toksumakov Olga G.Matveeva Dmitriy V.Grudinin Kirill V.Voronin Arslan Mazitov Konstantin V.Kravtsov Alexander V.Syuy Dmitry M.Tsymbarenko Mikhail S.Mironov Sergey M.Novikov Ivan Kruglov Davit A.Ghazaryan Andrey A.Vyshnevyy Aleksey V.Arsenin Valentyn S.Volkov Kostya S.Novoselov 

机构地区：[1]Moscow Center for Advanced Studies,Kulakova str.20,Moscow 123592,Russia. [2]Emerging Technologies Research Center,XPANCEO,Internet City,Emmay Tower,Dubai,United Arab Emirates. [3]Donostia International Physics Center(DIPC),Donostia/San-Sebastián 20018,Spain. [4]Institute of Materials,Ecole Polytechnique Federale de Lausanne,1015 Lausanne,Switzerland. [5]Department of Chemistry,Lomonosov Moscow State University,Moscow 119991,Russia. [6]Laboratory of Advanced Functional Materials,Yerevan State University,Yerevan 0025,Armenia. [7]National Graphene Institute(NGI),University of Manchester,Manchester M139PL,UK. [8]Department of Materials Science and Engineering,National University of Singapore,Singapore 03-09 EA,Singapore. [9]Institute for Functional Intelligent Materials,National University of Singapore,117544 Singapore,Singapore

出　　处：《Light(Science & Applications)》2024年第4期645-653,共9页光（科学与应用)（英文版）

基　　金：K.S.N.acknowledges support from the Ministry of Education,Singapore(Research Centre of Excellence award to the Institute for Functional Intelligent Materials,I-FIM,project No.EDUNC-33-18-279-V12)and from the Royal Society(UK,grant number RSRP\R\190000).;S.M.N.acknowledges the financial support from the Ministry of Science and Higher Education(agreement No.075-15-2022-1150);A.S.S.and A.N.T.gratefully acknowledge the financial support from the RSF(grant No.22-19-00558);D.A.G.,A.V.A.,and V.S.V.acknowledge support from the Higher Education and Science Committee of the Ministry of Education,Science,Culture,and Sport of the Republic of Armenia Project No.23RL-2A031;D.M.T.acknowledges support from the M.V.Lomonosov Moscow State University Program of Development.

摘　　要：The emergence of van der Waals(vdW)materials resulted in the discovery of their high optical,mechanical,and electronic anisotropic properties,immediately enabling countless novel phenomena and applications.Such success inspired an intensive search for the highest possible anisotropic properties among vdW materials.Furthermore,the identification of the most promising among the huge family of vdW materials is a challenging quest requiring innovative approaches.Here,we suggest an easy-to-use method for such a survey based on the crystallographic geometrical perspective of vdW materials followed by their optical characterization.Using our approach,we found As2S3 as a highly anisotropic vdW material.It demonstrates high in-plane optical anisotropy that is~20%larger than for rutile and over two times as large as calcite,high refractive index,and transparency in the visible range,overcoming the century-long record set by rutile.Given these benefits,As2S3 opens a pathway towards nextgeneration nanophotonics as demonstrated by an ultrathin true zero-order quarter-wave plate that combines classical and the Fabry–Pérot optical phase accumulations.Hence,our approach provides an effective and easy-to-use method to find vdW materials with the utmost anisotropic properties.

关 键 词：ANISOTROPY ANISOTROPIC HIGH 

分 类 号：O43[机械工程—光学工程]