@article{135d2f690d5542e1ad43b8fd7677f800,
title = "Active dielectric metasurface based on phase-change medium",
abstract = "We propose all-dielectric metasurfaces that can be actively re-configured using the phase-change material Ge2Sb2Te5 (GST) alloy. With selectively controlled phase transitions on the composing GST elements, metasurfaces can be tailored to exhibit varied functionalities. Using phase-change GST rod as the basic building block, we have modelled metamolecules with tunable optical response when phase change occurs on select constituent GST rods. Tunable gradient metasurfaces can be realized with variable supercell period consisting of different patterns of the GST rods in their amorphous and crystalline states. Simulation results indicate a range of functions can be delivered, including multilevel signal modulating, near-field coupling of GST rods, and anomalous reflection angle controlling. This work opens up a new space in exploring active meta-devices with broader applications that cannot be achieved in their passive counterparts with permanent properties once fabricated. (Figure presented.).",
author = "Chu, {Cheng Hung} and Tseng, {Ming Lun} and Jie Chen and Wu, {Pin Chieh} and Chen, {Yi Hao} and Wang, {Hsiang Chu} and Chen, {Ting Yu} and Hsieh, {Wen Ting} and Wu, {Hui Jun} and Greg Sun and Tsai, {Din Ping}",
note = "Funding Information: The authors acknowledge financial support from Ministry of Science and Technology, Taiwan (Grant No. MOST-105-2745-M-002-002-ASP and 105-2917-I-564-019-) and Academia Sinica (Grant No. AS-103-TP-A06). They are also grateful to National Center for Theoretical Sciences, Molecular Imaging Center of National Taiwan University, National Center for High-Performance Computing, Taiwan, and Research Center for Applied Sciences, Academia Sinica, Taiwan for their supports. G. Sun acknowledges support from AFOSR (FA9550-14-1-0196, Dr. Gernot Pomrenke, Program Manager) and AOARD (FA2386-16-1-4069 FA2386-14-1-4073, Dr. Kenneth Caster, Program Manager). M. L. Tseng thanks Profs. Peter Nordlander and Naomi Halas in Rice University for their helpful discussions. C. H. Chu, M. L. Tseng and J. Chen contributed equally to this work. Publisher Copyright: {\textcopyright} 2016 by WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim",
year = "2016",
month = nov,
day = "1",
doi = "10.1002/lpor.201600106",
language = "English",
volume = "10",
pages = "986--994",
journal = "Laser and Photonics Reviews",
issn = "1863-8880",
publisher = "Wiley-VCH Verlag",
number = "6",
}