This work presents the design and optimization of a cascade nano-laser using CH3NH3PbI3 perovskite. Due to increasing threshold gain with decreasing device size and high Auger losses, the use of perovskite as the active medium in the cascade nano-laser was proposed, as the material possesses a high emission rate in the visible wavelength region, with relative ease of device fabrication. By optimizing the thickness of the perovskite, its width, and the thickness of the silica used, photonic and plasmonic modes were created, which were further considered to permit the generation of lasing, using their respective Purcell factors. The pump wavelength considered was 400 nm, with the laser emission then at 537 nm. For suitability of plasmonic lasing, a Purcell factor FP of 1.22 is reported here, with no possibility for photonic lasing due to its FP value being less than 1 in this design. However, mode-crossing effects were observed in the plasmonic mode at λ = 400 nm for two designs: at a silica thickness of 27.5 nm with perovskite thickness and width of 100 and 300 nm, respectively, and at a silica thickness of 30 nm with perovskite thickness and width of 95 and 300 nm, respectively. These mode-crossing effects can be further analyzed to use these devices in the design of potential new sensor systems, mainly for gas and chemical sensing, exploiting the refractive index sensing capability as a means to determine the concentration of the gases, or other chemicals, under study.

中文翻译：

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常温下运行的钙钛矿等离子体纳米激光器的设计与优化

这项工作介绍了使用 CH3NH3PbI3 钙钛矿的级联纳米激光器的设计和优化。由于随着器件尺寸的减小和俄歇损耗的增加而增加了阈值增益，因此建议在级联纳米激光器中使用钙钛矿作为活性介质，因为该材料在可见光波长区域具有高发射率，并且器件相对容易制造。通过优化钙钛矿的厚度、宽度和所用二氧化硅的厚度，创建了光子和等离子体模式，进一步考虑使用它们各自的珀塞尔因子产生激光。考虑的泵浦波长为 400 nm，激光发射波长为 537 nm。对于等离子体激光的适用性，此处报告了 1.22 的 Purcell 因子 FP，由于在此设计中其 FP 值小于 1，因此不可能进行光子激光发射。然而，对于两种设计，在 λ = 400 nm 的等离子体模式中观察到模式交叉效应：二氧化硅厚度为 27.5 nm，钙钛矿厚度和宽度分别为 100 和 300 nm，以及二氧化硅厚度为 30 nm 和钙钛矿厚度和宽度分别为 95 和 300 nm。可以进一步分析这些模式交叉效应，以在潜在的新传感器系统的设计中使用这些设备，主要用于气体和化学传感，利用折射率传感能力作为确定气体或其他化学物质浓度的手段，正在研究中。5 nm，钙钛矿厚度和宽度分别为 100 和 300 nm，二氧化硅厚度为 30 nm，钙钛矿厚度和宽度分别为 95 和 300 nm。可以进一步分析这些模式交叉效应，以在潜在的新传感器系统的设计中使用这些设备，主要用于气体和化学传感，利用折射率传感能力作为确定气体或其他化学物质浓度的手段，正在研究中。5 nm，钙钛矿厚度和宽度分别为 100 和 300 nm，二氧化硅厚度为 30 nm，钙钛矿厚度和宽度分别为 95 和 300 nm。可以进一步分析这些模式交叉效应，以在潜在的新传感器系统的设计中使用这些设备，主要用于气体和化学传感，利用折射率传感能力作为确定气体或其他化学物质浓度的手段，正在研究中。