Electrically Programmable Pixelated Graphene-Integrated Plasmonic Metasurfaces for Coherent Mid-Infrared Emission
arxiv(2024)
摘要
Active metasurfaces have recently emerged as compact, lightweight, and
efficient platforms for dynamic control of electromagnetic fields and optical
responses. However, the complexities associated with their post-fabrication
tunability significantly hinder their widespread applications, especially for
the mid-infrared range due to material scarcity and design intricacy. Here, we
experimentally demonstrate highly dynamic, pixelated modulations of coherent
mid-infrared emission based on an electrically programmable plasmonic
metasurface integrated with graphene field effect transistors (Gr-FETs). The
ultrabroad infrared transparency of graphene allows for free-form control over
plasmonic meta-atoms, thus achieving coherent mid-infrared states across a
broad range of wavelengths and polarizations. The spatial temperature
modulation generated by Gr-FETs is effectively synergized with the emissivity
control by the localized surface plasmon polaritons from gold nanoantennas.
This integrated temperature-emissivity modulation of metasurfaces is
systematically extended to form a pixelated 2D array, envisioning new
approaches toward scalable 2D electrical wiring for densely packed,
independently controlled pixels.
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