Enhance the Efficiency of Graphene-based THz Modulator by Optimizing the Brewster Angle

Xingyue Li, zhaohui zhang, Xiaoyan Zhao, Tianyao Zhang, Luqi Tao, Zhengyong Huang, Ying Li, Xianhao Wu, Lu Yin & Yuan Yuan
The gate-controllable electronical property of graphene provides a possibility of active tuning property for THz modulator. However, the common modulation technology which only depends on voltage cannot solve the problem of power consumption limitation in communication applications. Here, we demonstrated a Brewster angle-controlled graphene-based THz modulator, which could achieve a relatively high modulation depth with low voltage. First, we explored the complex relationships among the Brewster angles, reflection coefficients and the conductivities of graphene. Then,...
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