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Decay dynamics of quantum dots influenced by the local density of optical states of two-dimensional photonic crystal membranes
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10.1063/1.2977605
/content/aip/journal/apl/93/9/10.1063/1.2977605
http://aip.metastore.ingenta.com/content/aip/journal/apl/93/9/10.1063/1.2977605
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

(a) SEM images of the PCMs. (b) Experimental setup: The PCMs are placed in a cryostat and excited by a pulsed laser source. The time-resolved spontaneous emission is detected by an avalanche photodiode after spectral selection. A pinhole selects the emission from the central part of the PCM, the position of which can be adjusted with assistance from a charge coupled device camera.

Image of FIG. 2.
FIG. 2.

(a) Time-resolved decay curves shown on a normalized scale for varying lattice constant. For clarity, only the first 50 ns are displayed. A 2D bandgap effect is clearly visible in the region . (b) Fit of the triple-exponential model (dashed lines) to the measured decay curves for (upper blue curve) and 0.388 (lower green curve). For comparison, the decay curve of an unpatterned sample is also shown (gray curve slightly above the lower curve). All curves are scaled to have coincident maxima.

Image of FIG. 3.
FIG. 3.

(a) The inverse mean decay time of the experimental data (solid black dots) and the simulations (open blue circles). The dashed red line marks the value of measured in absence of the PCM. The shaded region indicates the measured 2D bandgap. (b) The positions of band edges for various values of and . Red circles and blue triangles are taken from Ref. 15 with being consistent with the calculations of Koenderink et al., 9 which are constrained to the horizontal line. The calculated 2D bandgap is indicated by the bright shading. Our experiment follows the inclined line with a broader 2D photonic bandgap as a result (dark shading).

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/content/aip/journal/apl/93/9/10.1063/1.2977605
2008-09-02
2014-04-20
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Decay dynamics of quantum dots influenced by the local density of optical states of two-dimensional photonic crystal membranes
http://aip.metastore.ingenta.com/content/aip/journal/apl/93/9/10.1063/1.2977605
10.1063/1.2977605
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