Kavli Affiliate: Zhuo Li
| First 5 Authors: Xiu Liu, Yibai Zhong, Zexiao Wang, Tianyi Huang, Sen Lin
| Summary:
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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