论文标题
具有较大自发增强的两纳米棒PT结构
Two-Nanorod PT Structure with Large Spontaneous Enhancement
论文作者
论文摘要
两模式耦合在光学元件中非常普遍且基本。最近，由于其与现实世界的紧密联系，更多的作品集中在光学模式耦合以及收益和损失上。对于一个增益和一个损耗模式之间的夫妇，通过调整耦合常数，频谱中的模式将首先停留，然后在常数通过一些临界点之后移动。这种相变可以通过非热PT PT相变理论来解释。但是，只有少数作品研究基于此过程的自发发射调整。如果我们可以调整自发发射，则在芯片光学系统上具有许多有希望的利用。我们在此模式耦合过程中使用金属纳米棒更深入地看待，找到特殊点，显示PT对称性和PT损坏的机制之间的相变，并显示对量子点发射的调整。我们的工作不仅促进了对多模式系统的理解，而且还提出了一种新的方法来调整自发发射的高度增强，从而抑制了芯片纳米光子学的未来基础。
Two-mode coupling is very common and basic in optics. Recently, a lot more works are focusing on the optical mode coupling with gain and loss due to its tighter link to actual world. For a couple between one gain and one loss mode, by adjusting the coupling constant, the mode in the spectrum will at first stay then move after the constant passing some critical point. This phase transition can be explained by non-Hermitian PT phase transition theory.However, only few works research the spontaneous emission adjustment based on this procedure. It has a lot of promising utilization in on chip optic systems if we can adjust spontaneous emission. We look more deeply in this mode coupling process using metallic nanorods, find the Exceptional Point, show the phase transition between PT symmetry and PT broken regime, and show the adjustment to quantum dot emission. Our work not only promote the understanding of multi-mode system, but also bring up with a new way to adjust high enhancement of spontaneous emission, tamping the foundation for future on chip nano photonics.
