Dependence of Operational Modes of PCSSs on Bias Voltage
光导开关工作模式与偏置电压的关系

The spatial distribution of the electric field and current density in Photoconduetive Semiconductor Switches(PCSSs) are obtained by using 2-D transient modeling,as well as the time dependence of the maximum field and the current through the devices.The main characteristics obtained agree with the experimental observations.The devices operate in linear mode when a low bias voltage is applied to the devices;while nonlinear characteristics will occur if the bias voltages is higher than the given value.The relation between the operational modes and the bias voltage is demonstrated in detail.The causes and the physics of the existeme of different modes under the diffe- rent bias voltage are also explained.