Journal
OPTICS COMMUNICATIONS
Volume 440, Issue -, Pages 184-189Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.optcom.2019.02.032
Keywords
Metamaterial; Vanadium dioxide; Terahertz; Intensity modulator
Categories
Funding
- National Natural Science Foundation of China [11574059, 61565004, 11774288]
- National technology major special project, China (02 sub-project) [2017ZX02101007-003]
- Natural Science Foundation of Guangxi, China [2015GXNSFDA139039, 2017GXNSF BA198116]
- Natural Science Foundation of Hunan Province, China [2018JJ2455]
- Innovation Project of GUET Graduate Education, China [2018YJCX70, 2018YJCX67, 2018YJCX74]
- GUET Excellent Graduate Thesis Program, China [16YJPYSS25]
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We experimentally demonstrate a terahertz (THz) intensity modulator based on vanadium dioxide (VO2) composite metamaterial. The unit cell of the modulator consists of two toroidal resonators and a central bar on Si3N4-VO2-Si3N4-Si composite substrate. When the current per device area is biased at 3.75 mA/mm(2), the intensity modulation depth reaches 97% and the full width at half maximum (FWHM) is 0.67 THz. Moreover, good linearity and weak hysteresis are observed in experiment. The presented modulator could be very useful for THz communications, imaging and sensing.
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