Controllable enhancement of excitonic spontaneous emission by quantum confined Stark effect in GaAs quantum wells embedded in quantum microcavities

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Abstract
Controllable enhancement of excitonic spontaneous emission is demonstrated with the tuning of emission wavelength by electric fields applied to GaAs single quantum wells located inside half-wavelength microcavities at low temperature, ∼50 K. Radiation patterns of the spontaneous emission from the microcavities, containing the quantum wells are found to be well controlled by the electric fields.