The demonstration of plasmon-assisted lasing by associating optical gain media with plasmonic nanostructures has led to a new generation of nanophotonic devices with unprecedented performances. However, despite the variety of designs demonstrated so far, the operation of these systems is in most cases limited to a single output wavelength, and some reports on multiline emission refer to mixing single nanolasers with the subsequent limitation in compactness. Here, we show multiline operation from a single plasmon-assisted nonlinear solid-state laser on which a linear chain of Ag nanoparticles is deposited. The system provides lasing at 1.08 μm, which is self-converted to the visible range through different parametric frequency-mixing processes generated at metal-dielectric interfaces. Near infrared and simultaneously green and tunable blue radiation with a subwavelength confinement in the direction perpendicular to the nanoparticle chain, are obtained at room temperature in CW regime. The results demonstrate the possibility of multifunctional operation from a single plasmon-assisted laser and offer new avenues for the development of highly integrable sources of coherent radiation.

中文翻译：

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单等离子辅助激光器的多线操作

通过将光增益介质与等离激元纳米结构相关联来进行等离激元辅助激光的演示，催生了具有前所未有性能的新一代纳米光子器件。但是，尽管到目前为止已经展示了各种各样的设计，但是在大多数情况下，这些系统的操作仅限于单个输出波长，有关多线发射的一些报道提到将单个纳米激光器混合在一起，从而在紧凑性方面受到了限制。在这里，我们显示了从单等离激元辅助的非线性固态激光器进行的多线操作，在该激光器上沉积了Ag纳米粒子的线性链。该系统提供的激光强度为1.08μm，可通过在金属-电介质界面产生的不同参数混频过程将其自动转换为可见光范围。在室温下以连续波方式在室温下获得近红外以及同时在垂直于纳米粒子链的方向上具有亚波长范围的绿色和可调谐蓝色辐射。结果表明，单等离激元辅助激光器可以进行多功能操作，并为开发高度可集成的相干辐射源提供了新途径。