Highly Localized Surface Plasmon Nanolasers via Strong Coupling

Jun Wei Liao, Zhen Ting Huang, Chia Hung Wu, Nikita Gagrani, Hark Hoe Tan, Chennupati Jagadish, Kuo-Ping Chen, Tien Chang Lu*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

1 Scopus citations


Surface plasmons have robust and strong confinement to the light field which is beneficial for the light-matter interaction. Surface plasmon amplification by stimulated emission of radiation (SPACER) has the potential to be integrated on the semiconductor chip as a compact coherent light source, which can play an important role in further extension of Moore's law. In this study, we demonstrate the localized surface plasmon lasing at room temperature in the communication band using metallic nanoholes as the plasmonic nanocavity and InP nanowires as the gain medium. Optimizing laser performance has been demonstrated by coupling between two metallic nanoholes which adds another degree of freedom for manipulating the lasing properties. Our plasmonic nanolasers exhibit lower power consumption, smaller mode volumes, and higher spontaneous emission coupling factors due to enhanced light-matter interactions, which are very promising in the applications of high-density sensing and photonic integrated circuits.

Original languageEnglish
Pages (from-to)4359-4366
Number of pages8
JournalNano letters
Issue number10
StatePublished - 24 May 2023


  • Localized surface plasmon
  • Nanowire
  • Plasmonic nanolaser
  • Strong coupling
  • Surface plasmon polariton


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