Materials with tunable negative index of refraction and reduced absorption

我们建议探索在最小吸收的光学区域构建负折射率材料的新方法。所使用的技术是利用激光利用电场和磁场分量的耦合来探索电磁诱导的手性。结果表明，在手性介质中，极化和磁化强度同时取决于探测场的电场和磁场分量，比在电介电常数ε和磁导率μ都需要为负值的非手性介质中更容易获得负折射。特别是，我们建议探索原子或量子点等共振偶极振子的系综中相干和干涉效应的潜力；研究手性负折射率材料在理想透镜等方面的应用潜力；探索将相干控制的想法应用于固态超材料的可能性。此外，我们还将通过在负折射率材料中掺杂增益介质来研究其吸收补偿的噪声特性。

We propose to explore new ways to construct materials with negative index of refraction in the optical regime with minimum absorption. The technique used is to explore electromagnetically induced chirality taking advantage of the coupling of the electric and magnetic field components using laser light. It was shown that in chiral media, where polarization and magnetization depend on both the electric and magnetic component of the probe field, negative refraction is potentially much easier to obtain than in non-chiral media where both the electric permittivity ε and the magnetic permeability μ need to be negative. In particular, we propose to explore the potential of coherence and interference effects in ensembles of resonant dipole oscillators such as atoms or quantum dots for negative refraction; to investigate the potential of chiral negative index materials for applications such as a perfect lens; to explore the possibilities to apply ideas of coherent control to solid-state meta-materials. Furthermore, we will study the noise properties of absorption compensation in negative index materials by doping it with a gain medium.