Photonic Landscape Engineering for Tailor-Made Coherent Emission from Strongly-Coupled Organic and Biological Fluorophores

微腔（MCs）为研究光子和极化子色散提供了一个灵活的平台。在垂直mc中，受限光子表现出抛物色散关系，并且反过来与其他抛物粒子（如自由电子）的行为相似，尽管近似。有效质量小10^-5倍，导致非常低的凝结和/或激光阈值。通过在有机MC内部添加薄的中间层，可以观察到红移的光子态，将腔势转移到较低的能量。因此，对薄层进行图图化可以对潜在景观进行操作，并在2D和3D中创建极化子井和晶格。在本研究的过程中，将利用多势阱的相干耦合发射来展示来自晶格不同点的极化子的强相互作用以及光在真实空间中的宏观相干性。获取图像化参数，从而在设计这种微激光器的k空间发射时提供了进一步的自由度。通过改变周期光子线中的晶格常数，以及正方形和六边形点阵列，将对激光模式施加显著的控制，从而实现几乎任意的发射角和模式形状。控制缺陷态的引入有望进一步提高强耦合器件的性能。有机染料的有利性质为基础和应用研究提供了前所未有的可能性。特别是高度可控的可调谐极化激子激光器、无色散极化激子有机发光二极管和窄带光电探测器。

Microcavities (MCs) offer a flexible playground to study photon and polariton dispersion in a tunable potential landscape. In vertical MCs, confined photons exhibit a parabolic dispersion relation and in turn behave similarly to other parabolic particles such as free electrons, albeit with an approx. 10^-5 times smaller effective mass, leading to very low condensation and/or lasing thresholds. By adding a thin interlayer inside of an organic MC, one can observe red-shifted photonic states, shifting the cavity potential to lower energies. Consequently, patterning this thin layer enables a manipulation of the potential landscape and creates polariton wells and lattices in 2D and 3D. In the course of this fellowship, coherently coupled emission from multiple potential wells shall be utilized to showcase both the strong interaction of polaritons from different points of the lattice as well as the macroscopic coherence of light in the real space.Accessing the patterning parameters then gives a further degree of freedom in engineering the k-space emission of such microlasers. By changing the lattice constant in periodic photonic wires, as well as square and hexagonal dot arrays, a remarkable control over the lasing modes will be exerted, enabling almost arbitrary emission angles and mode shapes. The incorporation of controlled defect states is expected to further improve the performance of strongly coupled devices. The favourable properties of organic dyes enable a unprecedented scope of possibilites both for fundamental and applied research here. In particular, highly controlled tunable polariton lasers, dispersion-free polariton organic light emitting diodes and narrowband photodetectors can be envisioned.