Phase-change chalcogenide glass metamaterial
Z. L. Samson, K. F. MacDonald, F. De Angelis, K. Knight, C. C. Huang,, E. Di Fabrizio, D. W. Hewak, and N. I. Zheludev
TL;DR
This paper demonstrates a novel photonic metamaterial that uses phase-change chalcogenide glass to achieve significant resonance tuning and transmission modulation in the near-infrared range, enabling dynamic optical control.
Contribution
It introduces a hybrid metamaterial incorporating switchable chalcogenide glass for substantial resonance tuning and modulation capabilities.
Findings
10% shift in resonance wavelength due to phase change
Transmission contrast ratio of 4:1
Sub-wavelength device thickness
Abstract
Combining metamaterials with functional media brings a new dimension to their performance. Here we demonstrate substantial resonance frequency tuning in a photonic metamaterial hybridized with an electrically/optically switchable chalcogenide glass. The transition between amorphous and crystalline forms brings about a 10% shift in the near-infrared resonance wavelength of an asymmetric split-ring array, providing transmission modulation functionality with a contrast ratio of 4:1 in a device of sub-wavelength thickness.
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Taxonomy
TopicsPhase-change materials and chalcogenides · Photonic and Optical Devices · Optical Polarization and Ellipsometry