99% beta factor and directional coupling of quantum dots to fast light in photonic crystal waveguides determined by spectral imaging

Spontaneous emission from excitonic transitions in InAs/GaAs quantum dots embedded in photonic crystal waveguides at 5 K into nonguided and guided modes is determined by direct spectral imaging. This enables measurement of the absolute coupling efficiency into the guided modes, the beta factor, dire...

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Veröffentlicht in:	Physical review. B 2019-07, Vol.100 (3), p.035311, Article 035311
Hauptverfasser:	Scarpelli, L., Lang, B., Masia, F., Beggs, D. M., Muljarov, E. A., Young, A. B., Oulton, R., Kamp, M., Höfling, S., Schneider, C., Langbein, W.
Format:	Artikel
Sprache:	eng
Schlagworte:	Beta factor Circular polarization Coupling Decay rate Finite difference time domain method Photonic crystals Quantum dots Spectra Spontaneous emission Unit cell Waveguides
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