Determination of the enhanced excitation rate of quantum dots mediated by Bloch-like surface plasmon polaritons

M. Lin; Z. L. Cao; H. C. Ong

doi:10.1117/12.2077728

27 February 2015 Determination of the enhanced excitation rate of quantum dots mediated by Bloch-like surface plasmon polaritons

M. Lin, Z. L. Cao, H. C. Ong

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Proceedings Volume 9371, Photonic and Phononic Properties of Engineered Nanostructures V; 937122 (2015) https://doi.org/10.1117/12.2077728
Event: SPIE OPTO, 2015, San Francisco, California, United States

Abstract

Although it is known that the excitation of light emitters can be enhanced by surface plasmon polaritons, the corresponding rate has not yet been determined quantitatively. Here, we combine coupled mode theory and rate equation model to formulate the excitation rate in terms of measurable quantities and measure them systematically by using angle- and polarization-resolved reflectivity and photoluminescence spectroscopy. For CdSeTe quantum dots deposited on 2D Au nanohole array, we find the excitation increases by six times and the enhanced excitation rate is determined to be 8.52 meV. Our experimental results are consistent with finite-difference time-domain simulations.

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M. Lin, Z. L. Cao, and H. C. Ong "Determination of the enhanced excitation rate of quantum dots mediated by Bloch-like surface plasmon polaritons", Proc. SPIE 9371, Photonic and Phononic Properties of Engineered Nanostructures V, 937122 (27 February 2015); https://doi.org/10.1117/12.2077728

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KEYWORDS

Absorption

Reflectivity

Reflectance spectroscopy

Quantum dots

Dielectrics

Gold

Surface plasmon polaritons

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