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Polarization-switchable single photon source using the Stark effect
DOI:10.1063/1.2978396.png)
Abstract
En 中文
A polarization-switchable single photon source is demonstrated by embedding a self-assembled quantum dot in a high-quality, electrically gated, oxide-apertured micropillar cavity. Due to the noncircular aperture, the polarization degeneracy of the fundamental cavity mode is lifted, leaving two linearly polarized Q approximate to 20 000 modes separated by 194 mu eV. An intracavity electric field generated by an applied bias enables Stark shift tuning of the quantum dot emission over a frequency range containing both polarization modes, switching the dominant single photon polarization through the Purcell effect. We measure polarization switching up to 300 kHz, limited by the RC time constant of the device. (c) 2008 American Institute of Physics.
Keywords:
QUANTUM-DOT
CAVITY
SYSTEM
ATOM
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