Journal
OPTICS EXPRESS
Volume 20, Issue 19, Pages 21758-21765Publisher
OPTICAL SOC AMER
DOI: 10.1364/OE.20.021758
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Funding
- European Commission within the FP7 project QUANTIP [244026]
- Dutch Technology Foundation STW, applied science division of NWO
- Technology Program of the Ministry of Economic Affairs
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We demonstrate tunable on-chip single photon sources using the Stark tuning of single quantum dot (QD) excitonic transitions in short photonic crystal waveguides (PhC WGs). The emission of single QDs can be tuned in real-time by 9 nm with an applied bias voltage less than 2V. Due to a reshaped density of optical modes in the PhC WG, a large coupling efficiency beta >= 65% to the waveguide mode is maintained across a wavelength range of 5 nm. When the QD is resonant with the Fabry-Perot mode of the PhC WG, a strong enhancement of spontaneous emission is observed leading to a maximum coupling efficiency beta = 88%. These results represent an important step towards the scalable integration of single photon sources in quantum photonic integrated circuits. (C) 2012 Optical Society of America
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