Fundamental limits for transmission modulation in VO_(2) metasurfaces  

作　　者：BOHAN LI ROCIO CAMACHO-MORALES NEUTON LI ANDREA TOGNAZZI MARCO GANDOLFI DOMENICO DE CEGLIA COSTANTINO DE ANGELIS ANDREY A.SUKHORUKOV ANDDRAGOMIR N.NESHEV 

机构地区：[1]ARC Centre of Excellence for Transformative Meta-Optical Systems(TMOS),Department of Electronic Materials Engineering,Research School of Physics,The Australian National University,Canberra,ACT 2601,Australia [2]Department of Engineering,University of Palermo,Palermo 90128,Italy [3]Istituto Nazionale di Ottica,Consiglio Nazionale delle Ricerche,Brescia 25123,Italy [4]Department of Information Engineering,University of Brescia,Brescia 25123,Italy

出　　处：《Photonics Research》2023年第1期I0002-I0011,共10页光子学研究（英文版）

基　　金：Centre of Excellence for Transformative Meta Optical Systems(TMOS);Australian Research Council(CE20010001);North Atlantic Treaty Organization(G5850–OPTIMIST);Ministero dellapos;Universitàe della Ricerca(2020EY2LJT_002)。

摘　　要：The interest in dynamic modulation of light by ultra-thin materials exhibiting insulator–metal phase transition,such as VO_(2),has rapidly grown due to the myriad industrial applications,including smart windows and optical limiters.However,for applications in the telecommunication spectral band,the light modulation through a thin VO_(2) film is low due to the presence of strong material loss.Here,we demonstrate tailored nanostructuring of VO_(2) to dramatically enhance its transmission modulation,reaching a value as high as 0.73,which is 2 times larger than the previous modulation achieved.The resulting designs,including free-topology optimization,demonstrate the fundamental limit in acquiring the desired optical performance,including achieving positive or negative transmission contrast.Our results on nanophotonic management of lossy nanostructured films open new opportunities for applications of VO_(2) metasurfaces.

关 键 词：SURFACES DESIRED SMART 

分 类 号：O43[机械工程—光学工程]