Two-photon nonlinearity by an excitonic system placed in a cavity (8 pages)
Two-photon nonlinearity by an excitonic system placed in a cavity (8 pages)
复制标题
放置在空腔中的激子系统的双光子非线性（8 页）
DOI：
10.1103/physreva.71.063818
复制
发表时间：
2005
影响因子：
2.9
通讯作者：
H. Ishihara
中科院分区：
文献类型：
--
作者：
K. Koshino;H. Ishihara
我们研究了置于腔体内的有限尺寸激子系统的双光子非线性效应，注意到了系统尺寸N的依赖关系。双光子非线性利用半经典光学响应进行评估。在量子点极限下，激子系统表现为单个两能级系统，与腔模的耦合增强。在体积极限下，非线性相移随着N的增加而减小，与N ^{\ensuremath{-}1 scin 2}$成比例。
We have investigated the two-photon nonlinearity attained by a finite-sized excitonic system placed inside of a cavity, paying attention to the dependence on the system size $N$. The two-photon nonlinearity is evaluated by utilizing semiclassical optical responses. In the quantum-dot limit, the excitonic system behaves as a single two-level system with an enhanced coupling to the cavity mode. In the bulk limit, the nonlinear phase shift decreases as $N$ is increased, proportionally to ${N}^{\ensuremath{-}1∕2}$.