TITLE

Nanomechanical method to gauge emission quantum yield applied to nitrogen-vacancy centers in nanodiamond

AUTHOR(S)
Frimmer, Martin; Mohtashami, Abbas; Femius Koenderink, A.
PUB. DATE
March 2013
SOURCE
Applied Physics Letters;3/25/2013, Vol. 102 Issue 12, p121105
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
We present a technique to nanomechanically vary the distance between a fluorescent source and a mirror, thereby varying the local density of optical states at the source position. Our method can, therefore, serve to measure the quantum efficiency of fluorophores. Application of our technique to nitrogen-vacancy defects in diamond nanocrystals shows that their quantum yield can significantly differ from unity. Relying on a lateral scanning mechanism with shear-force probe-sample distance control our technique is straightforwardly implemented in most state-of-the-art near-field microscopes.
ACCESSION #
86446834

 

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