论文标题
润湿层中的等离子场诱导的亚稳态状态：由INAS/GAAS单量子点的荧光衰减时间检测到
Plasmon-field-induced Metastable States in the Wetting Layer: Detected by the Fluorescence Decay Time of InAs/GaAs Single Quantum Dots
论文作者
论文摘要
我们报告了一种新的方法，可以通过激子排放和金属岛的偶极场之间的辐射场耦合来降低润湿层（WL）的自发发射速率。结果，在INAS/GAAS单量子点（QD）的发射中检测到长千装的衰减过程。发现从WL层（QD层）到金属岛的分离距离约为20 nm，并且岛的平均大小约为50 nm，QD寿命可能会从大约1到160 ns变化。由于WL中存在长期的亚稳态状态，相应的二阶自相关函数g（2）（τ）从抗抗激素变为束和抗挑战特性。可以通过将金属岛作为偶极子近似中的许多偶极子振荡器来理解这种现象，这可能会在激子偶极子场与金属岛的诱导偶极场之间引起破坏性干扰。
We report a new way to slow down the spontaneous emission rate of excitons in the wetting layer (WL) through radiative field coupling between the exciton emissions and the dipole field of metal islands. As a result, a long-lifetime decay process is detected in the emission of InAs/GaAs single quantum dots (QDs). It is found that when the separation distance from WL layer (QD layer) to the metal islands is around 20 nm and the islands have an average size of approximately 50 nm, QD lifetime may change from approximately 1 to 160 ns. The corresponding second-order autocorrelation function g(2) (τ) changes from antibunching into a bunching and antibunching characteristics due to the existence of long-lived metastable states in the WL. This phenomenon can be understood by treating the metal islands as many dipole oscillators in the dipole approximation, which may cause destructive interference between the exciton dipole field and the induced dipole field of metal islands.
