Engineering Symmetry-Breaking Nanocrescent Arrays for Nanolasing

Yuanhai Lin, Danqing Wang, Jingtian Hu, Jianxi Liu, Weijia Wang, Jun Guan, Richard D. Schaller, Teri W. Odom

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

This paper describes a symmetry-breaking plasmonic lattice structure that can support narrow resonances as optical feedback for nanolasing. A scalable technique is developed to fabricate nanocrescent arrays with low-structural symmetry unit cells to achieve in-plane quadrupolar lattice plasmon modes. These lattice plasmons with extremely narrow linewidths preserve nonzero net dipole moments under normal excitation. Ultrafast band-edge lasing can be switched on and off by changing the polarization of the incident pump light. The quadrupolar lattice plasmon lasing process is simulated with a semi-quantum model and the sharp tips on the nanocrescents accelerate the lasing buildup process and enhance stimulated emission.

Original languageEnglish
Article number1904157
JournalAdvanced Functional Materials
Volume29
Issue number42
DOIs
Publication statusPublished - Oct 1 2019

Keywords

  • plasmon lasing
  • plasmonic nanocrescents
  • quadrupolar lattice plasmons
  • symmetry breaking
  • tip effects

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

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