经典光场相干控制金属纳米线表面等离子体传输

Coherent controlling surface plasmon transport properties in Ag nanowire by classic optical field

利用全量子力学的方法从理论上研究了利用经典光场相干控制半导体量子点-金属纳米线复合体系中表面等离子体传输特性.计算中假设金属纳米线表面等离子体具有线性色散关系,半导体量子点具有梯形三能级结构.分析表明:通过加或不加经典光场,可以控制表面等离子体被反射还是透射;加上光场后,反射峰、透射峰的位置以及两反射峰之间的距离都可以由经典光场控制.

Coherent controlling surface plasmon transport in metal nanowire coupled to quantum dot is investigated theoretically by real-space method.In the calculations,the dispersion relation of metal nanowire is supposed to be linear and the quantum dot is a cascaded three-level system.The calculations reveal that whether the surface plasmon is transmitted or reflected by turning off or on the classic field can be controlled.The surface plasmon transmission and reflection spectra can be controlled by adjusting the intensity and the circular frequency of classic optical field even the energy of surface plasmon and quantum dot is not matched.The dissipations affecting on the transport properties are also discussed.