Li, ChenyangZhang, XutaoYi, RuixuanLi, ZiyuanZhang, FanluLiu, KaihuiGan, XuetaoFu, LanXiao, FajunZhao, JianlinTan, HoeJagadish, Chennupati2024-10-092024-10-091863-8880https://hdl.handle.net/1885/733721316Multiwavelength plasmonic nanolasers are central to the quest for ultradense and versatile photonic integrations. However, the insufficient optical feedback and mode selection strategies result in a high lasing threshold and multi-mode operation with limited spectral purity and stability. Here, a multiwavelength near-infrared plasmonic nanolaser with high mode purity by leveraging a nontrivial "H"-shape plasmonic cavity is demonstrated. The nanolaser is constructed by inserting InGaAs/GaAs multi-quantum-disk (MQD) nanowires into a metallic Fabry-Perot cavity consisting of a pair of Ag nanowires positioned on an ultrasmooth Au film. The design is endowed with strong optical feedback to enhance the energy transfer between the exciton and plasmon, rendering a significant reduction of the lasing threshold. More importantly, the "H"-shape cavity is featured with a large flexibility in tuning the resonance wavelength, where multiwavelength lasing with the virtues of single-mode is realized at room temperature. The results make a crucial step toward near-infrared multiwavelength plasmonic nanolasers and open up exciting opportunities for applications such as ultracompact photonic integrated circuits and high-throughput biochemical sensing.application/pdfen-AU© 2023 The authors202310.1002/lpor.2023001872024-02-18