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Title: Electrically driven nanoantenna metasurface for coherent thermal emission
Nanoantennas and their arrays (metasurfaces) provide a versatile platform for controlling the coherence of thermal emission. Conventional designs rely on global heating, which impedes emission efficiency and on-chip integration. In this work, we propose an electrically driven metasurface composed of a Yagi-Uda nanoantenna array interconnected by S-shaped electrode wires, which enables the concurrent manipulation of thermal emission spectrally and directionally. A direct simulation approach based on the Wiener-chaos expansion method is employed for quantitative analysis. Our metasurface device exhibits a narrowband emission with high directivity, which is one order higher than that of a single nanorod antenna case. The modeling framework established in this work opens a promising route for realizing coherent mid-infrared emission by metasurfaces.  more » « less
Award ID(s):
1931964
PAR ID:
10498257
Author(s) / Creator(s):
; ; ; ; ; ;
Publisher / Repository:
AIP Publishing
Date Published:
Journal Name:
Applied Physics Letters
Volume:
123
Issue:
16
ISSN:
0003-6951
Format(s):
Medium: X
Sponsoring Org:
National Science Foundation
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