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.

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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

[1]
Mikhail Y. Shalaginov, “Reconfigurable All Dielectric Metasurfaces based on Optical Phase Change Materials: Design Approaches”, ACES Journal, vol. 35, no. 11, pp. 1445–1446, Nov. 2020.

Issue

2020: Vol 35 Iss 11

Section

General Submission