Control of Quantum Dot Emission by Colloidal Plasmonic Pyramids in a Liquid Crystal

Jao Van De Lagemaat, Haridas Mundoor, Enid Cruz-Colon, Sungoh Park, Qingkun Liu, Ivan Smalyukh

Research output: Contribution to journalArticlepeer-review

3 Scopus Citations


We study the plasmon-enhanced fluorescence of a single semiconducting quantum dot near the apex of a colloidal gold pyramid spatially localized by the elastic forces of the liquid crystal host. The gold pyramid particles were manipulated within the liquid crystal medium by laser tweezers, enabling the self-assembly of a semiconducting quantum dot dispersed in the medium near the apex of the gold pyramid, allowing us to probe the plasmon-exciton interactions. We demonstrate the effect of plasmon coupling on the fluorescence lifetime and the blinking properties of the quantum dot. Our results demonstrate that topological defects around colloidal particles in liquid crystal combined with laser tweezers provide a platform for plasmon exciton interaction studies and potentially could be extended to the scale of composite materials for nanophotonic applications.

Original languageAmerican English
Pages (from-to)5459-5469
Number of pages11
JournalOptics Express
Issue number4
StatePublished - 17 Feb 2020

Bibliographical note

Publisher Copyright:
© 2020 Optical Society of America.

NREL Publication Number

  • NREL/JA-5900-75469


  • blinking
  • light emission
  • plasmonics
  • quantum dots
  • solar-photochemistry


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