周期驱动下半导体动力学行为及控制

从nGaAs载流子非线性输运理论出发,建立物理模型,推导其动力学方程,分析系统随外场变化出现的复杂分支情况.数值模拟表明,在输入场幅值和频率变化的一定范围内,该系统具有周期、准周期和混沌特性,计算了表征混沌特性的物理量.利用间隙脉冲驱动法控制混沌得到预期的周期轨道 关键词： 分支 混沌 负微分电导

Dynamical behaviour and its control in periodically driven semiconductor

A model for n GaAs based on nonlinear carrier transport theory has been proposed. Complex bifurcations are studied as the excited field varies. Numerical simulation shows that the system exhibits periodicity, quasi\|periodicity, and chaos, depending on the frequency and amplitude of the externally applied field, as expected. We also compute the quantities characterizing chaotic behaviours.An occasional pulse driving technique to control chaotic attactor to the desired periodic trajectory is illustrated.