Millimeter-Scale Spatial Coherence from a Plasmon Laser

Thang B. Hoang, Gleb M. Akselrod, Ankun Yang, Teri W. Odom, Maiken H. Mikkelsen

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

Coherent light sources have been demonstrated based on a wide range of nanostructures, however, little effort has been devoted to probing their underlying coherence properties. Here, we report long-range spatial coherence of lattice plasmon lasers constructed from a periodic array of gold nanoparticles and a liquid gain medium at room temperature. By combining spatial and temporal interferometry, we demonstrate millimeter-scale (∼1 mm) spatial coherence and picosecond (∼2 ps) temporal coherence. The long-range spatial coherence occurs even without the presence of strong coupling with the lattice plasmon mode extending over macroscopic distances in the lasing regime. This plasmonic lasing system thus provides a platform for understanding the emergence of long-range coherence from collections of nanoscale resonators and points toward novel types of distributed lasing sources.

Original languageEnglish
Pages (from-to)6690-6695
Number of pages6
JournalNano letters
Volume17
Issue number11
DOIs
Publication statusPublished - Nov 8 2017

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Keywords

  • Plasmonics
  • nanolasers
  • spatial coherence
  • temporal coherence

ASJC Scopus subject areas

  • Bioengineering
  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanical Engineering

Cite this

Hoang, T. B., Akselrod, G. M., Yang, A., Odom, T. W., & Mikkelsen, M. H. (2017). Millimeter-Scale Spatial Coherence from a Plasmon Laser. Nano letters, 17(11), 6690-6695. https://doi.org/10.1021/acs.nanolett.7b02677