论文标题

金属固定INP纳米棒激光器的缩放:光学性能和热效应

Scaling of Metal-Clad InP Nanodisk Lasers: Optical Performance and Thermal Effects

论文作者

Tiwari, Preksha, Wen, Pengyan, Caimi, Daniele, Mauthe, Svenja, Triviño, Noelia Vico, Sousa, Marilyne, Moselund, Kirsten E.

论文摘要

光学片上通信的关键组件是有效的光源。但是,为了使每位通信的低能能和与SI CMO的局部整合,需要进一步缩小设备。在这项工作中,我们通过直接在SI上的直接晶片结合在INP中制造了不同形状的微型和纳米射手。已经提出了金属层腔,作为通过利用杂交光子质量模式来扩展尺寸超出光的衍射极限的手段。在这里,我们通过用AU覆盖设备的侧壁来探索窃窃私语模式光源的尺寸可扩展性。金属层腔表现出室温在光激发的室温激发时,Au盖装置的INP直径降至300 nm,而纯光子对应物显示仅显示激光量仅为500 nm。数值热模拟支持实验发现,并确认了AU盖设备的热量插头能力,这表明与没有AU的金属粘合INP纳米型激光器相比,金属固定的INP纳米型激光器的设备温度降低了473 K。即使没有混合光子质量质量模式,这也将提供可观的性能优势。这些结果使我们深入了解了金属包装设计对SI降低集成激光的好处。

A key component for optical on-chip communication is an efficient light source. However, to enable low energy per bit communication and local integration with Si CMOS, devices need to be further scaled down. In this work, we fabricate micro- and nanolasers of different shapes in InP by direct wafer bonding on Si. Metal-clad cavities have been proposed as means to scale dimensions beyond the diffraction limit of light by exploiting hybrid photonic-plasmonic modes. Here, we explore the size scalability of whispering-gallery mode light sources by cladding the sidewalls of the device with Au. The metal clad cavities demonstrate room temperature lasing upon optical excitation for Au-clad devices with InP diameters down to 300 nm, while the purely photonic counterparts show lasing only down to 500 nm. Numerical thermal simulations support the experimental findings and confirm an improved heat-sinking capability of the Au-clad devices, suggesting a reduction in device temperature of 473 K for the metal-clad InP nanodisk laser, compared to the one without Au. This would provide substantial performance benefits even in the absence of a hybrid photonic-plasmonic mode. These results give us insight into the benefits of metal-clad designs to downscale integrated lasers on Si.

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