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Phys. Rev. B 72, 193303 (2005) [4 pages]

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

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J. Hendrickson, B. C. Richards, J. Sweet, S. Mosor, C. Christenson, D. Lam, G. Khitrova, and H. M. Gibbs
Optical Sciences Center, The University of Arizona, Tucson, Arizona 85721, USA

T. Yoshie
Department of Electrical and Computer Engineering, Duke University, Durham, North Carolina 27708, USA

A. Scherer
Department of Electrical Engineering, California Institute of Technology, Pasadena, California 91125, USA

O. B. Shchekin and D. G. Deppe
Microelectronics Research Center, Department of Electrical and Computer Engineering, The University of Texas at Austin, Austin, Texas 78712, USA

Received 22 August 2005; published 9 November 2005

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.


©2005 The American Physical Society

URL: http://link.aps.org/doi/10.1103/PhysRevB.72.193303
DOI: 10.1103/PhysRevB.72.193303
PACS: 42.55.Tv, 42.50.Pq, 42.55.Sa

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