Hyperbolic metamaterials have emerged as novel materials with exciting functionalities, especially for optoelectronic devices. Here, we provide the first attempt to integrate hyperbolic metamaterials with light emitting nanostructures, which enables to strongly enhance random laser action with reduced lasing threshold. Interestingly, the differential quantum efficiency can be enhanced by more than four times. The underlying mechanism can be interpreted well based on the fact that the high-k modes excited by hyperbolic metamaterials can greatly increase the possibility of forming close loops decreasing the energy consumption for the propagation of scattered photons in the matrix. In addition, out-coupled propagation of the high-k modes reaches to the far-field without being trapped inside the metamaterials due to the coupling with the random distribution of light emitting nanoparticles also plays an important role. Electromagnetic simulations derived from the finite-difference time-domain (FDTD) method are executed to support our interpretation. Realizing strong enhancement of laser action assisted by hyperbolic metamaterials provides an attractive, very simple and efficient scheme for the development of high performance optoelectronic devices, including phototransistors, and many other solid state lighting systems. Besides, because of increasing light absorption assisted by hyperbolic metamaterials structure, our approach shown is also useful for the application of highly efficient solar cells.

中文翻译：

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纳米级光发射体和双曲线超材料的集成：增强随机激光作用的有效平台。

双曲线超材料已经成为具有令人兴奋的功能的新型材料，特别是对于光电设备。在这里，我们提供了首次尝试将双曲线超材料与发光纳米结构集成在一起，从而能够以增强的激光阈值大大增强随机激光作用。有趣的是，差分量子效率可以提高四倍以上。基于双曲线超材料激发的高k模可以极大地增加形成闭环的可能性，从而降低了在矩阵中传播光子的能量消耗，因此可以很好地解释其基本机制。此外，高k的向外耦合传播由于与发光纳米粒子的随机分布的耦合，模态到达远场而不会被困在超材料内部，这也起着重要的作用。执行从有限差分时域（FDTD）方法派生的电磁仿真以支持我们的解释。实现由双曲线超材料辅助的激光作用的强烈增强，为开发高性能光电器件（包括光电晶体管和许多其他固态照明系统）提供了一种有吸引力，非常简单且有效的方案。此外，由于在双曲线超材料结构的辅助下增加了光吸收，因此我们展示的方法对于高效太阳能电池的应用也很有用。