Remanent switching of Bloch-polaritons

布洛赫极化子的剩余开关

• 批准号: 390089887
• 负责人: Dr. Chris Sturm
• 金额: --
• 依托单位: Abteilung Halbleiterphysik
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2018
• 资助国家: 德国
• 起止时间: 2017-12-31 至 2022-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/390089887?language=en
• 关键词: Remanent; switching; Bloch; polaritons

The aim of the project is to develop photonic structures which allows a non-volatile switching (remanently and persistently) of a quantum mechanical state at room temperature and above. This is reached by developing structures which allows the coupling of the photonic Bloch surface modes with the electronic system of the excitons, forming so-called Bloch-polaritons. By means of resonant excitation a propagating polariton condensate will be realized. The photonic component of these polaritons ensures the long range propagation over several hundreds of micrometre and a high surface sensitivity. This high surface sensitivity will be exploite in order to control and change the properties of the Bloch-polaritons, e.g. energy, momentum, spin and phase of the wave function, by means of a ferroelectric material which will be integrated at the surface of the structure. By applying an electric pulse, a ferroelectric polarisation within the ferroelectric material will be created or rather changed. The coupling of this polarisation with the piezoelectric one of an adjoin ZnO layer leads to a change of the optical properties of the photonic structure and therewith of the Bloch-polaritons. The proof of this change of the properties of the Bloch-polaritons will be done by optical methods. Therefore, this approach allows the electrically writing and the optical read-out of a state. Furthermore, the properties of Bloch-polaritons as their interaction with their environment, their relaxation and scattering behaviour as well as the possibilities to control their properties will be investigated in detail within this project. These properties are not discussed in the literature and are of special interest since Bloch-polaritons are very promising for the realization of devices and integrated optics based on polaritons since they do not exhibit limitations with respect to their propagation length and an operation at low temperatures.

该项目的目的是开发光子结构，允许在室温及以上的量子力学状态的非易失性切换（残留和持久）。这是通过开发允许光子布洛赫表面模式与激子的电子系统耦合的结构来实现的，形成所谓的布洛赫极化激元。通过共振激发，将实现传播极化激元凝聚。这些极化激元的光子成分确保了在数百微米范围内的长距离传播和高表面灵敏度。这种高表面灵敏度将被利用，以控制和改变的布洛赫极化激元的属性，例如能量，动量，自旋和波函数的相位，通过铁电材料将被集成在该结构的表面。通过施加电脉冲，将产生或更确切地说改变铁电材料内的铁电极化。这种偏振与相邻ZnO层的压电偏振的耦合导致光子结构的光学性质的变化，从而导致布洛赫极化激元的变化。布洛赫极化激元性质的这种变化的证明将通过光学方法来完成。因此，该方法允许状态的电写入和光学读出。此外，布洛赫极化激元的性质，如它们与环境的相互作用，它们的弛豫和散射行为以及控制它们的性质的可能性将在本项目中详细研究。这些特性在文献中没有讨论，并且是特别感兴趣的，因为布洛赫极化激元对于基于极化激元的器件和集成光学的实现是非常有前途的，因为它们不表现出关于它们的传播长度和在低温下的操作的限制。