Single quantum dot controlled lasing effects in high-Q micropillar cavities.
Lasing effects based on individual quantum dots have been investigated in optically pumped high-Q micropillar cavities. We demonstrate a lowering of the threshold pump power from a off-resonance value of 37 microW to 18 microW when an individual quantum dot exciton is on-resonance with the cavity mode. Photon correlation studies below and above the laser threshold confirm the single dot influence. At resonance we observe antibunching with g((2))(0) = 0.36 at low excitation, which increases to 1 at about 1.5 times the threshold. In the off-resonant case, g((2))(0) is about 1 below and above threshold.
Technische Physik, Universität Würzburg, Würzburg, Germany. stephan.reitzenstein@physik.uni-wuerzburg.de
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Reitzenstein
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Böckler
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Bazhenov
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Gorbunov
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Löffler
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Kamp
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Kulakovskii
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Forchel
D003198:Computer Simulation; D017076:Computer-Aided Design; D004867:Equipment Design; D019544:Equipment Failure Analysis; D054023:Lasers, Semiconductor; D008962:Models, Theoretical; D045663:Quantum Dots; D014159:Transducers