Affiliation:
1. Shandong University
2. Harbin Institute of Technology
3. Shanghai Institute of Satellite Engineering
Abstract
Thermochromism film can automatically adjust its emittance without
additional energy consumption, which shows great prospect in the
application of spacecraft thermal control. However, it is still
challenging to achieve a large infrared emittance at a high
temperature and emittance tunability of the thermochromism film. In
this work, we propose a
V
O
2
particle-based intelligent
metasurface for spacecraft thermal control, which consists of a square
lattice array of hollow spheroidal
V
O
2
particles on Au substrate. The
metasurface with a
V
O
2
particle having a large aspect ratio (
∼
10
) displays perfect emission throughout
the entire mid-infrared spectral range. The emittance tunability can
exceed 0.63 with total normal emittance of 0.85. The underlying
mechanisms involved in the metasurface are attributed to
particle-dependent scattering, by which the infrared emittance is
dramatically enhanced for the metallic state and restricted for the
dielectric state. In addition, the infrared emittance at a high
temperature and emittance tunability of the metasurface remain large
for incident angles up to 60°. To the best of our knowledge, this work
proposes the first thermochromism film structure with perfect infrared
emission, which could accelerate the development and practical
application of the thermochromic film in the field of spacecraft.
Funder
National Natural Science Foundation of
China
Shanghai Sailing Program
Subject
Atomic and Molecular Physics, and Optics,Engineering (miscellaneous),Electrical and Electronic Engineering
Cited by
3 articles.
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