Structured complex potentials for designer topological systems and devices in optics

光学拓扑系统和器件设计者的结构化复杂势

• 批准号: 18F18790
• 负责人: 樽茶 清悟
• 金额: $ 1.34万
• 依托单位: Institute of Physical and Chemical Research
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for JSPS Fellows
• 财政年份: 2018
• 资助国家: 日本
• 起止时间: 2018-11-09 至 2021-03-31
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-18F18790/
• 关键词: topological; exciton-polariton; non-Hermitian; superfluidity; polariton; complex lattice; Haldane model

Experimentally demonstrated a new technique for non-resonant temporal modulation of polariton condensates via the beating of two, frequency-locked lasers. This allows for very fast modulation, and probing of non-adiabatic regimes of carrier relaxation.Combining the intensity beating with laser-wavefront tailoring, arbitrary spatial potentials with temporal modulation are formed. A 1D conveyor belt has been demonstrated, with the observation of tilted bands and a non-adiabatically pushed condensate. Further, using Laguerre-Gauss laser modes, preliminary measurements of a non-resonantly rotated polariton condensate were achieved.These new techniques enable as-yet unexplored methods of creating topological states of exciton-polaritons, e.g. by rapid rotation, or by shaken optical lattices.

实验演示了一种新的技术，通过两个频率锁定的激光器的跳动，非共振时间调制的极化激元凝聚。这使得非常快的调制，和探测的非绝热制度的载流子relaxation.Combining强度拍频与激光波前剪裁，任意的空间潜力与时间调制形成。一个一维的传送带已被证明，与倾斜的带和一个非螺旋推动的冷凝物的观察。此外，利用拉盖尔-高斯激光模式，实现了对非共振旋转极化激元凝聚体的初步测量，这些新技术使尚未探索的方法能够产生激子-极化激元的拓扑态，例如通过快速旋转或通过振动光学晶格。