Polarization-independent terahertz wave modulator based on graphene-silicon hybrid structure
Du Liang-Liang1, 2, Li Quan2, Li Shao-Xian2, Hu Fang-Rong1, Xiong Xian-Ming1, Li Yan-Feng1, Zhang Wen-Tao1, †, 
, Han Jia-Guang2, ‡,
, Han Jia-Guang2, ‡, Raman spectra of (a) the proposed monolayer-graphene sample and (b) the double-layer-graphene sample under photoexcitation of 100 mW and zero bias. Insets show Raman shifts of the 2D peak under photoexcitation of 100 mW but different bias voltages (–60 V–5 V).
