Abstract
We experimentally demonstrate actively tunable infrared absorption based on graphene-covered SiC metasurfaces. A dry transfer method is employed to coat monolayer graphene on the metasurface characterized by scanning electron microscope, atomic force microscopy, and Raman spectroscopy. A solid polymer electrolyte is introduced to tune the graphene chemical potential upon electrical gating. In situ optical measurement shows a shift in the absorption peak upon a change in gate voltage. Numerical simulations unveil that the tuning effect is attributed to the excitation of a magnetic polariton, whose resonance frequency changes with graphene chemical potential upon electrical gating. The reported results realize the possibility of tuning thermal radiative property of a graphene-covered metasurface through a solid polymer electrolyte, providing a new approach to fabricating graphene-based tunable infrared devices for dynamic radiative thermal management and sensing applications.
Original language | English (US) |
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Pages (from-to) | 4810-4817 |
Number of pages | 8 |
Journal | ACS Applied Nano Materials |
Volume | 2 |
Issue number | 8 |
DOIs | |
State | Published - Aug 23 2019 |
Keywords
- electrical gating
- graphene
- infrared absorber
- phonon absorption
- solid polymer electrolyte
ASJC Scopus subject areas
- General Materials Science