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*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

68 Scopus citations

Abstract

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
Volume9
Issue number4
DOIs
StatePublished - 28 Apr 2015

Keywords

  • nanolaser
  • nanowire
  • silver
  • surface plasmon
  • ZnO

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