All-optical tuning of a quantum dot in a coupled cavity system

Details All-optical tuning of a quantum dot in a coupled cavity system All-optical tuning of a quantum dot in a coupled cavity system

2012-03-27

arxiv.org/abs/1203.6044v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

10 pages, 3 figures

Scientific paper

We demonstrate a method of tuning a semiconductor quantum dot (QD) onto resonance with a cavity mode all-optically. We use a system comprised of two evanescently coupled cavities containing a single QD. One resonance of the coupled cavity system is used to generate a cavity enhanced optical Stark shift, enabling the QD to be resonantly tuned to the other cavity mode. A twenty-seven fold increase in photon emission from the QD is measured when the off-resonant QD is Stark shifted into the cavity mode resonance, which is attributed to radiative enhancement of the QD. A maximum tuning of 0.06 nm is achieved for the QD at an incident power of 88 {\mu}W.

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