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Historically non-classical sources of single photons have been used to test quantum mechanics and to develop the field of quantum optics. Nowadays the single photon source has become a critical device for quantum communications and optical quantum information processing [Knill, et al., 2001]. A single photon source emits one photon at a time, and its quality can be evaluated by three parameters: quantum...
Recently, single photon sources have been realised by coupling InAs quantum-dots into circular micro-pillar microcavities based on distributed Bragg reflectors (DBRs). These sources can be highly efficient because the high semiconductor refractive index collects a large fraction of the spontaneous emission into the waveguide mode. We have modelled emission from circular, square, elliptical and rectangular...
Benefits of elliptical micropillars are reported including polarisation control of dot emission; and increased quality factors as one of the loss mechanisms found in circular micropillars is removed.
The polarised cavity modes of a semiconductor microcavity pillar with elliptical cross-section can be used to enhance the photoluminescence (PL) emission of a quantum dot. We study dots embedded within very high Q value elliptical microcavity pillars, where the two orthogonally polarised modes are very well resolved. We show that a dot that emits unpolarised PL when off-resonance with the cavity mode...
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