论文标题
在量子井中的磁带中的磁偶极子吸收
Magnetic dipole absorption of light at intersubband transitions in quantum wells
论文作者
论文摘要
我们考虑了在宽间隙量子井（QW）中的iRight triblband跃迁的理论上磁性偶极子机制。与电偶极共振相反，讨论的机制与电磁辐射的S极分成分相互作用表现出来。我们证明了a）在一个粒子近似的框架中，磁和电偶极子间跨带的频率相等； b）集体等离子体效应应导致典型QW中磁性和电偶极子共振之间的频率转移。这就是为什么磁和电偶极子谐振频率的独立测量可以允许提取QW参数和集体费米相互作用的理论模型的实验验证。考虑到磁偶极子吸收的相对弱点，我们提出了一种用于其实验观察的波导方案。
We consider theoretically magnetic dipole mechanism of the IR-light absorption at intersubband transitions in wide-gap quantum wells (QW). In contrast to the electric dipole resonance, discussed mechanism manifests in the interaction with the s-polarized component of electromagnetic radiation. We demonstrated that a) the frequencies of magnetic and electric dipole intersubband transitions in 2D layer are equal in the framework of one-particle approximation; b) collective plasma effects should lead to a significant frequency shift between the magnetic and electric dipole resonances in typical QW. That is why independent measurements of the magnetic and electric dipole resonant frequencies could allow both the extracting the QW parameters and the experimental verifying of theoretical models of collective fermion interaction. Taking into account relative weakness of the magnetic dipole absorption, we propose a waveguide scheme for its experimental observation.
