设计了一种基于石墨烯表面等离子激元波导的同或/异或逻辑门,其采用了上下话路型微环谐振器为基本单元。通过调节石墨烯化学势来控制石墨烯表面等离子激元的传输状态,器件的两个不同输出端口同时获得同或和异或逻辑运算结果。仿真分析结果表明:当工作频率为30 THz,石墨烯化学势为0.677 eV和0.95 eV时,基于石墨烯表面等离子激元波导的上下话路型微环谐振器可实现开启与关闭;所构建的同或/异或逻辑门在‘00’、‘01’、‘10’、‘11’四组逻辑操作数下的最差串扰为-10.60 dB。

A graphene-based plasmonic XNOR/XOR logic gate where the add-drop-channel micro-ring resonators are used as the basic unit is designed. The transmission states of graphene-based surface plasmonics can be controlled by tuning the chemical potential of graphene, and so that the XNOR and XOR operation results can be obtained simultaneously at the two output ports of this device. The simulation results show that the opening and closing of the add-drop-channel micro-ring resonators of graphene-based plasmonic waveguide can be realized when the chemical potentials are 0.677 eV and 0.95 eV, and the working frequency is 30 THz. In addition, the minimum crosstalk of the designed XNOR/XOR logic gates is -10.60 dB when the input logic states are ‘00’, ‘01’, ‘10’ and ‘11’.