期刊
MATERIALS LETTERS
卷 234, 期 -, 页码 138-141出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.matlet.2018.09.084
关键词
Optical materials and properties; Microstructure; Meta surface; Absorber; Terahertz
资金
- National Natural Science Foundation of China [11504305]
A broadband tunable absorber is studied based on the silicon metasurface at terahertz frequencies. By tuning the conductivity of silicon, absorptance is more than 90% from 0.497 THz to 1.045 THz with central frequency of 0.771 THz when the conductivity is equal to 2500 S/m. Simulated results show that absorptance peak can be modulated from 1% to 100% when the conductivity continuously changes from 0 S/m to 2500 S/m. The central-symmetry structure leads to polarization independence. Our design may be used as optoelectronic modulator, tunable detector, and terahertz switch. (C) 2018 Elsevier B.V. All rights reserved.
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