Journal
APPLIED PHYSICS EXPRESS
Volume 12, Issue 6, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.7567/1882-0786/ab213b
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Funding
- National Natural Science Foundation of China [61875017, 61107030]
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A nearly structural-insensitive switchable broadband terahertz metamaterial absorber is proposed, which consists of several gold rods and a vanadium dioxide (VO2) ground plane separated by a dielectric spacer. By controlling the temperature of VO2, state of the absorber can be switched from on to off in the frequency range of 1.116-1.564 THz. The physical mechanism of the absorber is given based on the wave-interference theory and field distributions. Interestingly, the proposed absorber shows a similar performance for random arrangements of a given number of rods on the top layer, which could greatly reduce the requirement of fabrication accuracy. (C) 2019 The Japan Society of Applied Physics
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