▎ 摘　　要

We present the graphene-based TM/TE independent ring modulator with large resonance tunability and modulation bandwidth. By adjusting the external voltage from different directions, the graphene-based ring modulator can operate either on TM or TE mode. Through the performance analysis and optimization, the proposed optical ring modulator exhibits a large resonance tunability over 5.8 nm/V and a broadband operation wavelength spectrum from 1.3 mu m to 2 mu m, the large extinction ratio of 20.8 dB and 24 dB can be achieved for TM and TE modulator, respectively. Besides, this device exhibits a large 3 dB electro-optic bandwidth which is rarely seen in conventional ring modulators, and all these features would make the proposed graphene ring modulator find great potential use in future optical communications.