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Photoluminescence decay rate engineering of CdSe quantum dots in ensemble arrays embedded with gold nano-antennae
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10.1063/1.4817650
/content/aip/journal/jap/114/6/10.1063/1.4817650
http://aip.metastore.ingenta.com/content/aip/journal/jap/114/6/10.1063/1.4817650

Figures

Image of FIG. 1.
FIG. 1.

Schematic representation of hybrid films in the polymer template showing the dispersion of CdSe quantum dots in P4VP block and Au nanoparticles in PS block, indicated by the red and brown dots, respectively.

Image of FIG. 2.
FIG. 2.

Representative energy distribution inside the film (energy decreasing from red to blue) due to the plane wave excitation at 488 nm wavelength incident along the normal Z-axis; shown using a Z-section of a 9 cell volume. The Au nanoparticles appear in red primarily, the quantum dots in the inner cylinder appear in yellow or green, and the PS/P4VP matrices are minimally polarized.

Image of FIG. 3.
FIG. 3.

PL spectra collected from films with small (a) and large (b) quantum dots doped with large metal nano-antennae.

Image of FIG. 4.
FIG. 4.

PL spectra collected from films with small (a) and large (b) quantum dots doped with small metal nano-antennae.

Image of FIG. 5.
FIG. 5.

PL decay curve from films doped with large Au nano-antennae with small quantum dots (a) S (○), SL1 (◻), SL2 ( ), and (b) large quantum dots L (○), LL1 (◻), LL2 ( ).

Image of FIG. 6.
FIG. 6.

PL decay curve from films embedded with small Au nano-antennae and small quantum dots, (a) S (○), SS1 (◁), SS2(▷), and with large quantum dots (b) L (○), LS1 (◁), LS2 (▷).

Tables

Generic image for table
Table I.

Diameter of CdSe quantum dot , Au nanoparticles , thickness (t), volume fraction, and number density ratio of CdSe quantum dot to Au nanoparticles for the samples used in the experiments.

Generic image for table
Table II.

Extracted values of experimental (τ), normalized lifetimes in comparison to the respective quantum dot films ( ), calculated values using DDA method ( ), the values of quantum yield, η and the calculated values of radiative and non radiative decay rates for the samples used in the experiments.

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/content/aip/journal/jap/114/6/10.1063/1.4817650
2013-08-09
2014-04-19
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Photoluminescence decay rate engineering of CdSe quantum dots in ensemble arrays embedded with gold nano-antennae
http://aip.metastore.ingenta.com/content/aip/journal/jap/114/6/10.1063/1.4817650
10.1063/1.4817650
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