Ultrastrong Mode Confinement in ZnO Surface Plasmon Nanolasers

Yu Hsun Chou, Bo Tsun Chou, Chih Kai Chiang, Ying Yu Lai, Chun Ting Yang, Heng Li, Tzy Rong Lin, Chien Chung Lin, Hao Chung Kuo, Shing Chung Wang, Tien Chang Lu

Research output: Contribution to journalArticlepeer-review

76 Citations (Scopus)


Nanolasers with an ultracompact footprint can provide high-intensity coherent light, which can be potentially applied to high-capacity signal processing, biosensing, and subwavelength imaging. Among various nanolasers, those with cavities surrounded by metals have been shown to have superior light emission properties because of the surface plasmon effect that provides enhanced field confinement capability and enables exotic light-matter interaction. In this study, we demonstrated a robust ultraviolet ZnO nanolaser that can operate at room temperature by using silver to dramatically shrink the mode volume. The nanolaser shows several distinct features including an extremely small mode volume, a large Purcell factor, and a slow group velocity, which ensures strong interaction with the exciton in the nanowire.

Original languageEnglish
Pages (from-to)3978-3983
Number of pages6
JournalACS Nano
Issue number4
Publication statusPublished - 2015 Apr 28

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Engineering(all)
  • Physics and Astronomy(all)


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