Beam switching and bifocal zoom lensing using active plasmonic metasurfaces  

作　　者：Xinghui Yin Tobias Steinle Lingling Huang Thomas Taubner Matthias Wuttig Thomas Zentgraf Harald Giessen 

机构地区：[1]th Physics Institute and Research Center SCoPE,University of Stuttgart,70550 Stuttgart,Germany [2]Max-Planck-Institute for Solid State Research,Heisenbergstrasse 1,70569 Stuttgart,Germany [3]Beijing Institute of Technology,No.5 South Zhongguancun Street,Beijing 100081,China [4]I.Institute of Physics(IA),RWTH Aachen University,52056 Aachen,Germany [5]Department of Physics,University of Paderborn,Warburger Straße 100,33098 Paderborn,Germany

出　　处：《Light(Science & Applications)》2017年第1期363-369,共7页光（科学与应用)（英文版）

基　　金：support by the ERC Advanced Grant(COMPLEXPLAS);BMBF(13N9048 and 13N10146);the Baden Württemberg Stiftung(Internationale Spitzenforschung II);DFG(SPP1391,FOR730 and GI 269/11-1);SFB 917(Resistive Nanoswitches);support by the Carl-Zeiss-Stiftung。

摘　　要：Compact nanophotonic elements exhibiting adaptable properties are essential components for the miniaturization of powerful optical technologies such as adaptive optics and spatial light modulators.While the larger counterparts typically rely on mechanical actuation,this can be undesirable in some cases on a microscopic scale due to inherent space restrictions.Here,we present a novel design concept for highly integrated active optical components that employs a combination of resonant plasmonic metasurfaces and the phase-change material Ge3Sb2Te6.In particular,we demonstrate beam switching and bifocal lensing,thus,paving the way for a plethora of active optical elements employing plasmonic metasurfaces,which follow the same design principles.

关 键 词：ACTIVE BEAM-FORMING metasurfaces phase-change material PLASMONICS 

分 类 号：P15[天文地球—天文学]