Department of Physics and Astronomy, University of Western Ontario, London, Canada N6A 3K7.
Opt Lett. 2009 Oct 1;34(19):2909-11. doi: 10.1364/OL.34.002909.
The effect of the dipole-dipole interaction (DDI) on absorption processes has been investigated in photonic nanowires. They are manufactured by embedding a photonic crystal into another crystal. The embedded crystal is doped with an ensemble of three-level quantum dots. A probe field is applied to monitor the absorption coefficient. A control field is applied to induce dipole moments in quantum dots. Owing to these fields dipoles are induced in quantum dots, and they interact with each other via the DDI. Quantum dots also interact with bound photon states of the nanowire via the electron-bound photon interaction. It is found that the system can be switched from a transparent state to an absorbing state through the DDI. The switching mechanism can be controlled by changing the location of a resonant energy in the quantum dots.
在光子纳米线中研究了偶极-偶极相互作用 (DDI) 对吸收过程的影响。它们是通过将光子晶体嵌入另一种晶体来制造的。嵌入的晶体掺杂有一组三个能级的量子点。施加探测场以监测吸收系数。施加控制场以在量子点中诱导偶极矩。由于这些场，量子点中会感应出偶极子，它们通过 DDI 相互作用。量子点还通过电子束缚光子相互作用与纳米线的束缚光子态相互作用。结果发现，通过 DDI 可以将系统从透明状态切换到吸收状态。通过改变量子点中共振能量的位置可以控制切换机制。
