Quantum dot photonic-crystal-slab nanocavities: Quality factors and lasing

Creators: Hendrickson, J.; Richards, B. C.; Sweet, J.; Mosor, S.; Christenson, C.; Lam, D.; Khitrova, G.; Gibbs, H. M.; Yoshie, T.; Scherer, A.; Shchekin, O. B.; Deppe, D. G.

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Abstract

Emission linewidths of quantum dot photonic-crystal-slab nanocavities are measured as a function of temperature and fabrication parameters with low-power and high-power, cw and pulsed, nonresonant excitation. The cavity linewidth is dominated by the absorption of the ensemble of quantum dots having a density of ~=400/µm2; above the absorption edge, the cavity linewidth broadens considerably compared with the empty cavity linewidth. Gain and lasing are seen for high-power pumping; it is estimated that only a small number of quantum dots contributes to the lasing.

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©2005 The American Physical Society (Received 22 August 2005; published 9 November 2005) The Tucson group thanks DARPA, NSF AMOP and EPDT, and AFOSR; the Caltech group thanks the MURI Center for Photonic Quantum Information Systems (ARO/ARDA), NSF-ECS-NIRT, and AFOSR; and the Texas group thanks NSF-ECS-NIRT for financial support.

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