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Tunable coupling between exciton and surface plasmon in liquid crystal devices consisting of Au nanoparticles and CdSe quantum dots
- Source :
- Applied Physics Letters. 98:261918
- Publication Year :
- 2011
- Publisher :
- AIP Publishing, 2011.
-
Abstract
- We report controllable coupling between exciton and localized surface plasmon in a liquid crystal device consisting of gold nanoparticles and CdSe quantum dots. Through an external electric voltage, the emission wavelength of quantum dots can be manipulated. The underlying mechanism is based on the fact that by changing the dielectric index of liquid crystal with an external bias, the surface plasmon frequency of metal nanoparticles can be adjusted. It is therefore possible to control the energy difference between exciton and surface plasmon resonance, and hence to change their coupling strength. Our strategy may open up a possible route for the development of smart optoelectronic devices with tunable emission color.
- Subjects :
- Materials science
Physics and Astronomy (miscellaneous)
business.industry
Exciton
Surface plasmon
Physics::Optics
Nanoparticle
Condensed Matter::Mesoscopic Systems and Quantum Hall Effect
Surface plasmon polariton
Quantum dot
Liquid crystal
Optoelectronics
Surface plasmon resonance
business
Localized surface plasmon
Subjects
Details
- ISSN :
- 10773118 and 00036951
- Volume :
- 98
- Database :
- OpenAIRE
- Journal :
- Applied Physics Letters
- Accession number :
- edsair.doi...........f11f81f1256e000cb1cbe3551cf1afde
- Full Text :
- https://doi.org/10.1063/1.3606539