We study the coupling of GaAs quantum wells to waveguide–plasmon polaritons supported by a thin InAlGaAs-based slab waveguide and a Ag grating. The hybrid photon–plasmon modes are excited in a freestanding emitter–waveguide–plasmon structure realized by rolling-up strained InAlGaAs-based layers and nanopatterned Ag structures. By varying the grating’s bar width, we tune the plasmonic resonance of the system. We observe by means of spatially, spectrally, and temporally resolved photoluminescence measurements, a coupling of the quantum-well emission to the waveguide–plasmon system for a specific grating’s bar width. Supported by finite-element simulations, we can assign the coupling to the excitation of a waveguide–plasmon polariton.

中文翻译：

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卷起的微管中量子阱发射与波导-等离激元的耦合

我们研究了由薄的基于InAlGaAs的平板波导和Ag光栅支撑的GaAs量子阱与波导-等离激元的耦合。光子-等离激元混合模式在独立的发射器-波导-等离激元结构中被激发，该结构通过累积应变式InAlGaAs基层和纳米图案化的Ag结构而实现。通过改变光栅的条形宽度，我们可以调整系统的等离子体共振。我们通过空间，光谱和时间分辨的光致发光测量观察到，对于特定光栅的条宽，量子阱发射与波导-等离子体系统的耦合。在有限元模拟的支持下，我们可以将耦合分配给波导-等离激元极化子的激发。