Journal
PLASMONICS
Volume 11, Issue 5, Pages 1285-1290Publisher
SPRINGER
DOI: 10.1007/s11468-015-0173-2
Keywords
Tunable metasurface lens; Vanadium dioxide; Terahertz
Funding
- 973 Program of China [2013CBA01702]
- National Natural Science Foundation of China [61205097, 11374216, 91233202, 11204188, 11174211, 11474206]
- National High Technology Research and Development Program of China [2012AA101608-6]
- Beijing Natural Science Foundation [1132011]
- Program for New Century Excellent Talents in University [NCET-12-0607]
- Program for Beijing Excellent Talents [2013D005016000008]
- CAEP THz Science and Technology Foundation
- Beijing youth top-notch talent training plan [CITTCD201504080]
- Scientific Research Base Development Program of the Beijing Municipal Commission of Education
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Based on the insulator-to-metal phase transition of vanadium dioxide (VO (2)), a terahertz (THz) tunable metasurface lens (TML), which consists of a THz metasurface lens and a VO (2) film on Al (2) O (3) substrate, is proposed and experimentally verified. The focal intensity of the TML can be thermally controlled. The changes of the cross-polarized amplitude spectrum and the focal intensity during the heating and cooling processes are also investigated in detail. Any desired focal intensity can be obtained by adjusting the TML temperature. This TML and its approach will be of great significance for the development of the THz active devices.
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