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Broadband enhancement and inhibition of single quantum dot emission in plasmonic nano-cavities operating at telecommunications wavelengths
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10.1063/1.4818131
/content/aip/journal/apl/103/6/10.1063/1.4818131
http://aip.metastore.ingenta.com/content/aip/journal/apl/103/6/10.1063/1.4818131
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Figures

Image of FIG. 1.
FIG. 1.

(Top left) Scanning electron microscope image of a gold cavity with air-filled collar. (Top right) Cross-section of the structure along the plane; the emitting dipoles, placed in the central plane of the InP cylinder, are randomly positioned and oriented in the plane. (Bottom) Photoluminescence spectrum of a Au-coated (black) and an uncoated (red) InP cylinder, with  nm,  nm, and  nm, obtained under high-intensity continuous excitation; the cavity resonance can be clearly seen at 1325 nm. Noise in the [1350 nm to 1450 nm] window is due to strong absorption by and in the atmosphere. Both curves are arbitrarily normalized to unity at nm.

Image of FIG. 2.
FIG. 2.

Decay curves for an on- (green curve) and off- (red curve) resonance quantum dot as well as for a quantum dot in an uncoated mesa (black curve), corresponding to lifetimes of τ = 0.33 ns, 5.2 ns, and 1.3 ns, respectively.

Image of FIG. 3.
FIG. 3.

(Top) Theoretical Purcell factor for the cavity under consideration as a function of wavelength. Five configurations are displayed: centered dipole (blue), dipole shifted by 100 nm (red), or 200 nm (green) from the center in either radial (solid) or ortho-radial (dotted) orientation. (Bottom) Experimental points for the modification of the spontaneous emission rate of embedded single quantum dots as a function of the detuning of the emission from the cavity resonance (1325 nm); the expected spontaneous emission rate modification for radially (red line) and ortho-radially (green dotted line) oriented dipoles located, respectively, 100 nm and 200 nm off-axis, are shown as indicative values for the upper and lower bounds of the experimental Purcell factors.

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/content/aip/journal/apl/103/6/10.1063/1.4818131
2013-08-07
2014-04-23
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Broadband enhancement and inhibition of single quantum dot emission in plasmonic nano-cavities operating at telecommunications wavelengths
http://aip.metastore.ingenta.com/content/aip/journal/apl/103/6/10.1063/1.4818131
10.1063/1.4818131
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