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Nanomechanical method to gauge emission quantum yield applied to nitrogen-vacancy centers in nanodiamond
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10.1063/1.4798327
/content/aip/journal/apl/102/12/10.1063/1.4798327
http://aip.metastore.ingenta.com/content/aip/journal/apl/102/12/10.1063/1.4798327
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Figures

Image of FIG. 1.
FIG. 1.

(a) Experimental principle: The distance between an emitter and a mirror is varied by laterally scanning a spherical mirror over the sample. (b) Sketch of experimental setup. The sample lies on a piezo stage with the micromirror located above. The mirror is attached to an optical fiber glued to a quartz tuning fork, which is positioned with an xyz-piezo scanner [see inset]. Below the sample, a microscope objective focuses the pump laser on the emitter. Fluorescence is filtered by a dichroic (DC) beam splitter (BS) and long-pass (LP) filter before it is guided to a Hanbury Brown-Twiss setup composed of a BS and two APDs.

Image of FIG. 2.
FIG. 2.

(a) Fluorescence-intensity map of dye-doped bead in laser focus as micromirror is scanned across it, showing ring-shaped intensity variations. Each pixel denotes a specific lateral position of the mirror. (b) Fluorescence-lifetime map of same measurement that yielded (a). (c) Decay rate versus mirror-sample distance, as obtained from (b) by combining pixels with identical distance to the center of the circular pattern. Full diamonds are data obtained from (b), measured on 100 nm fluorescing bead. Open symbols show results on continuous dye layers (different positions, and different micromirrors [see legend]). Solid and dashed lines are analytical calculations for dye layer and fluorescing bead, respectively.

Image of FIG. 3.
FIG. 3.

(a) Data-points: Decay rate of a single NV center in a diamond nanocrystal as a function of distance to the scanning mirror. Error bars denote -interval. Red solid line: Calculation of LDOS experienced by emitter at depth d = 150 nm into the substrate, with dipole moment in the sample plane ( ) and QE = 26%. (b) Same as (a) but for NV defect in different nanocrystal (Calculation: QE = 58%).

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/content/aip/journal/apl/102/12/10.1063/1.4798327
2013-03-26
2014-04-24
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Nanomechanical method to gauge emission quantum yield applied to nitrogen-vacancy centers in nanodiamond
http://aip.metastore.ingenta.com/content/aip/journal/apl/102/12/10.1063/1.4798327
10.1063/1.4798327
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