Reconfigurable All Dielectric Metasurfaces based on Optical Phase Change Materials: Design Approaches

Authors

  • Mikhail Y. Shalaginov Dept. of Materials Science & Engineering Massachusetts Institute of Technology Cambridge, MA, USA
  • Sensong An Dept. of Electrical & Computer Engineering Univ. of Massachusetts Lowell Lowell, MA, USA
  • Yifei Zhang Dept. of Materials Science & Engineering Massachusetts Institute of Technology Cambridge, MA, USA
  • Fan Yang Dept. of Materials Science & Engineering Massachusetts Institute of Technology Cambridge, MA, USA
  • Clayton Fowler Dept. of Electrical & Computer Engineering Univ. of Massachusetts Lowell Lowell, MA, USA
  • Hualiang Zhang Dept. of Electrical & Computer Engineering Univ. of Massachusetts Lowell Lowell, MA, USA
  • Juejun Hu Dept. of Materials Science & Engineering Massachusetts Institute of Technology Cambridge, MA, USA
  • Tian Gu Dept. of Materials Science & Engineering Massachusetts Institute of Technology Cambridge, MA, USA

Keywords:

GSST, metasurface, metalens, PCM, phase change materials, reconfigurable optics

Abstract

Optical metasurface is a recently emerged paradigm for controlling light propagation, which enables implementation of ultra-compact optical devices with extended functionalities. Nowadays the main challenge in the field is to realize active metasurfaces with high quality, high efficiency, and large tuning range. Here we present a design approach for constructing a twostate reconfigurable metalens made of low-loss optical phasechange material (O-PCM). The metalens design is capable to produce diffraction limited focusing, large change in focal length (from 1.5 mm to 2mm), and decent focusing efficiency of about 20% in both states. The proposed design methodology is generic and can be easily extended towards constructing metasurfaces, which can switch between two or more arbitrary phase maps.

References

L. Kang, R. P. Jenkins, and D. H. Werner, “Recent progress in active optical metasurfaces,” Adv. Opt. Mater., vol. 7, no. 14, pp. 1-26, 2019.

Y. Zhang, et al., “Broadband transparent optical phase change materials for high-performance nonvolatile photonics,” Nat. Commun., vol. 10, no. 1, pp. 1-9, 2019.

M. Y. Shalaginov, et al, “Reconfigurable all-dielectric metalens with diffraction limited performance,” arXiv: 1911.12970 7014, 2019.

S. An, et al., “A deep learning approach for objective-driven all-dielectric metasurface design,” ACS Photonics, p. acsphotonics.9b00966, Nov. 2019.

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Published

2020-11-07

How to Cite

Mikhail Y. Shalaginov, Sensong An, Yifei Zhang, Fan Yang, Clayton Fowler, Hualiang Zhang, Juejun Hu, & Tian Gu. (2020). Reconfigurable All Dielectric Metasurfaces based on Optical Phase Change Materials: Design Approaches. The Applied Computational Electromagnetics Society Journal (ACES), 35(11), 1445–1446. Retrieved from https://journals.riverpublishers.com/index.php/ACES/article/view/7647

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