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Simulations of the effect of waveguide cross-section on quantum dot – plasmon coupling

Vernon, Kristy C., Gomez, Daniel E., Davis, Timothy J., & Tischler, Nora (2011) Simulations of the effect of waveguide cross-section on quantum dot – plasmon coupling. Journal of Applied Physics, 110(7), 074315.

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Abstract

Quantum dot - plasmon waveguide systems are of interest for the active control of plasmon propagation, and consequently, the development of active nanophotonic devices such as nano-sized optical transistors. This paper is concerned with how varying aspect ratio of the waveguide crosssection affects the quantum dot - plasmon coupling. We compare a stripe waveguide with an equivalent nanowire, illustrating that both waveguides have a similar coupling strength to a nearby quantum dot for small waveguide cross-section, thereby indicating that stripe lithographic waveguides have strong potential use in quantum dot –plasmon waveguide systems. We also demonstrate that changing the aspect ratio of both stripe and wire waveguides can increase the spontaneous emission rate of the quantum dot into the plasmon mode, by up to a factor of five. The results of this paper will contribute to the optimisation of quantum dot - plasmon waveguide systems and help pave the way for the development of active nanophotonics devices.

Impact and interest:

3 citations in Scopus
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2 citations in Web of Science®

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112 since deposited on 17 Oct 2011
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ID Code: 46095
Item Type: Journal Article
Keywords: plasmon, quantum dot, lithographic
DOI: 10.1063/1.3650900
ISSN: 0021-8979
Subjects: Australian and New Zealand Standard Research Classification > PHYSICAL SCIENCES (020000) > OPTICAL PHYSICS (020500) > Photonics Optoelectronics and Optical Communications (020504)
Australian and New Zealand Standard Research Classification > TECHNOLOGY (100000) > NANOTECHNOLOGY (100700) > Nanophotonics (100711)
Divisions: Past > QUT Faculties & Divisions > Faculty of Science and Technology
Past > Schools > Physics
Copyright Owner: Copyright 2011 American Institute of Physics
Deposited On: 18 Oct 2011 09:46
Last Modified: 19 Oct 2011 18:51

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