Journal
APPLIED PHYSICS LETTERS
Volume 105, Issue 17, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.4901045
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Funding
- University of Cambridge
- European Research Council ERC [617985]
- EU-FP7 Marie Curie Initial Training Network [S3NANO]
- Clare College Cambridge
- Engineering and Physical Sciences Research Council [1106434] Funding Source: researchfish
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We report on the feedback stabilization of the zero-phonon emission frequency of a single InAs quantum dot. The spectral separation of the phonon-assisted component of the resonance fluorescence provides a probe of the detuning between the zero-phonon transition and the resonant driving laser. Using this probe in combination with active feedback, we stabilize the zero-phonon transition frequency against environmental fluctuations. This protocol reduces the zero-phonon fluorescence intensity noise by a factor of 22 by correcting for environmental noise with a bandwidth of 191 Hz, limited by the experimental collection efficiency. The associated sub-Hz fluctuations in the zero-phonon central frequency are reduced by a factor of 7. This technique provides a means of stabilizing the quantum dot emission frequency without requiring access to the zero-phonon emission. (C) 2014 AIP Publishing LLC.
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