Millimeter-Scale Spatial Coherence from a Plasmon Laser

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

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

40 Scopus citations


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 (US)
Pages (from-to)6690-6695
Number of pages6
JournalNano letters
Issue number11
StatePublished - Nov 8 2017


  • Plasmonics
  • nanolasers
  • spatial coherence
  • temporal coherence

ASJC Scopus subject areas

  • General Chemistry
  • Condensed Matter Physics
  • Mechanical Engineering
  • Bioengineering
  • General Materials Science


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