Open AccessControl of quantum dot emission by colloidal plasmonic pyramids in a liquid crystal
Author(s) -
Haridas Mundoor,
Enid M. Cruz-Colón,
Sungoh Park,
Qingkun Liu,
Ivan I. Smalyukh,
Jao Lagemaat
Publication year - 2020
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.383672
Subject(s) - plasmon , materials science , quantum dot , optical tweezers , liquid crystal , pyramid (geometry) , nanolaser , tweezers , optics , exciton , optoelectronics , surface plasmon , laser , nanotechnology , physics , condensed matter physics , lasing threshold , wavelength
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.