论文标题
陀螺仪系统中圆形光钙效应的半经典理论
Semiclassical theory of the circular photogalvanic effect in gyrotropic systems
论文作者
论文摘要
我们为超过电子散射速率的经典光子能量提供了圆形光钙效应（CPGE）的理论，但与平均电子动能相比很小。在此频率范围内，可以使用两种不同的方法来计算CPGE。在完全量子力学的方法中，我们通过将费米的黄金法则应用于传导和价带中的虚拟中间状态，从而找到光电流密度。在半经典方法的框架中，我们应用了一个广义的玻尔兹曼方程，并考虑了浆果 - 呈诱导的异常速度，侧跳和偏斜散射。对Wurtzite对称晶体进行计算。两种方法都为CPGE电流产生相同的结果，这些结果表明两种方法之间的一致性以及半经典理论在描述非线性高频传输的描述。
We develop a theory of circular photogalvanic effect (CPGE) for classically high photon energies which exceed the electron scattering rate but are small compared to the average electron kinetic energy. In this frequency range one can calculate the CPGE by using two different approaches. In the fully quantum-mechanical approach we find the photocurrent density by applying Fermi's golden rule for indirect intraband optical transitions with virtual intermediate states both in the conduction and valence bands. In the framework of the semiclassical approach, we apply a generalized Boltzmann equation with accounts for the Berry-curvature induced anomalous velocity, side jumps and skew scattering. The calculation is carried out for a wurtzite symmetry crystal. Both methods yield the same results for the CPGE current demonstrating consistency between the two approaches and applicability of the semiclassical theory for the description of nonlinear high-frequency transport.
