论文标题
拓扑软件中光学模式的数值建模
Numerical modeling of optical modes in topological soft matter
论文作者
论文摘要
矢量和涡流激光束在许多应用中都需要，通常是通过操纵激光输出或通过在激光腔中插入光学成分而创建的。显然，将液晶插入激光腔，可以广泛控制发射光，因为它们对外部田间的敏感性很高和双重性质。在这项工作中，我们展示了使用数值建模的拓扑双折射软件结构启用和稳定的激光的多种光学模式。如径向列液滴中的拓扑软质结构，在不同的几何形状的2D列腔中，我们显示了各种光的结构 - 具有不同的3D强度和极化曲线 - 在不同的几何形状中，包括具有不同电荷和绕组的拓扑缺陷，并在任意不同的有不同的双重缺陷领域中具有不同的电荷和绕线数。我们使用自定义的书面FDFD代码来计算新兴的电磁本质。对激光的控制是旨在创造一般强度，极化和拓扑形状的激光束的特别兴趣。
Vector and vortex laser beams are desired in many applications and are usually created by manipulating the laser output or by inserting optical components in the laser cavity. Distinctly, inserting liquid crystals into the laser cavity allows for extensive control over the emitted light due to their high susceptibility to external fields and birefringent nature. In this work we demonstrate diverse optical modes for lasing as enabled and stablised by topological birefringent soft matter structures using numerical modelling. We show diverse structuring of light -- with different 3D intensity and polarization profiles -- as realised by topological soft matter structures in radial nematic droplet, in 2D nematic cavities of different geometry and including topological defects with different charges and winding numbers, in arbitrary varying birefringence fields with topological defects and in pixelated birefringent profiles. We use custom written FDFD code to calculate emergent electromagnetic eigenmodes. Control over lasing is of a particular interest aiming towards the creation of general intensity, polarization and topologically shaped laser beams.
